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Les diagrammes suivants illustrent la muthode. ita lure, ] 1 2 3 1 2 3 4 5 6 ^dHl MI FU ROBKR' Hal ^&m Witttv & a^o.'k ^mmmaX ^ttits. MENTAL ARITHMETIC, BY J. A. McLELLAN, M.A., LL.D., Inspector of Iliyh Schools, Ontario, PART I. FUNDAMENTAL EULES, FRACTIONS, ANALYSIS. 18 78. ADAM MILLER & CO., Toronto. RoBKRT Miller, Montreal', J. Lanolais, Quebec; Bucklky k Allrn, Halifax, N. S. ; J. k A. McMillan, St. John, N B, ; Urrwrr Bros., Charlottetv%on, P. E. I. C(l\ /^^ Entered according to the Act of Partiamcnt of Canada, in tbe year ono thousand eij^ht hundred and gevcnty-eight, hy Adam Millkr & Co., in the office of the Minister of Agr culture. PREFACE. Mental Arithmetic is not intended to superfsede written arithmetic, but should rather be its constant auxiliary. Without proper mental training, the pupil becomes ac- customed to depend almost entirely on rules and for- mulae — not capable of interpretino; the latter, and entirely in the dark as to the reasons of tlie former. The long and barren reign of rule and routine is due to the fact that rational methods in teaching the Logic of the Public School have been too generally ignored — that Menial Arithmetic, which, by easy steps, leads the pupil into an intelligent possession of principles, and renders him expert and logical it) their application, has hitherto held an utterly insignificant place in school-room work. Given a slate, a pencil, a rule, and a salutary dread of coming trouble, and a pupil was supposed to be seized of all the elements necessary to make him a first-rate arith- metician. But better methods have begun to prevail ; and the improvement in teaching written arithmetic which has taken place during the past few years has only to be supplemented by systematic mental training, in order to reach the highest results of the study of the same. This is recognized bv the various educational authorities throughout the Dominion. Most of them have, it is believed, made it imperative that their teachers shall have a thorough training in Mental Arithmetic, and prove by actual examination, their knowledge of rational methods as well as their ability to teach them. PREFACE. In a very short tinle the wisdom of this course will be seen, not only in increased proficiency in mathematical science, but in consequently increased intelligence and power in mastering other subjects. It is hoped that this work, undertaken at urgent re- quest of many teachers and inspectors, will be found useful in suggesting the methods and affording the materials for thorough and systematic mental training. No formal rules nor definitions have been given — these can be given by the teacher when the pu})il has been led by easy inductions to a clear comprehension of th(f ideas and principles they involve. A great variety of type ques- tions on the fundamtntal rules, fractions, and analysis, has bfien given ; and the teacher can multiply at pleasure questions corresponding to the various types. The Second Part, most of which is already written, will contain illustrations of condse methods of computa- tion, ratio, and proportional parts, a full treatment of all the rules that come under the gen* a*al head of percentage, and a large collection of xamination papers for mental solution, affording examples of every variety of question likely to be met with in ordinary written arithmetic. HINTS TO TEACHERS. 1. Use natural objects (numeral frame, etc.) to give first notions of numbers. First, teach carefully the ana- lysis of elementary numbers (with their notation) up to nine inclusive — so as to give clear notions of addition, subtraction, multiplication and division. 2. In addition etc., let the pupil have plenty of drill in small numbers, till he thoroughly comprehends the ele- mentary processes. Types of easy questions are given in the book — let similarly easy questions be framed by the teacher, and by the pupils for mutual drill. 3. Give many practical questions, so that ultimately when a problem is prepared the pupil will be able^o know in an instant which of the fundamental niles, or what combination of them, is to be applied in the solu- tion. 4. Always proceed from the known to the unknown. The pupil learns subtraction from his knowledge of addition^ etc., etc. : knowing that 4 + 3 = 7, he knows that 7 — 3 = 4, and that 7 — 4 = 3; knowing that 4 X 3 = 12, he knows that 12 contains 4, 3 times, and 3, 4 times, etc. * 5. In the '* simple rules," prepare the way for fractions ; make young scholars familiar with factors, multiples, measures. The pupil having become thoroughly familiar by proper training in the simple rules, with the notion of division into equal parts, and with the language expres- HINTS TO TSACHBBS. sing such division, will find but little difficulty in the whole subject of fractions. 6. In general, pupils should not Ije permitted to use a text-book during recitation — ^young pupils need no book ; those who have advanced to division, analysis, etc., will do better to prepare assigned lessons, and at the same time, should have additional questions proposed corres- ponding to the given types. 7. In addition to daily oral work, there should he/re- queiit written examinations ; the pupils are furnished with pencils and small slips of paper ; they are directed to turn to certain questions, to write down on their slips the numbers of these questions, and are then allowed a given time to solve them mentally, using the pencil only to write, opposite its number, the answer they have found for any question. 8. The pupil should commence mental arithmetic wlien he enters school, and should continue it so long as it is thought necessai-y that arithmetic should be one of his studies. ti 7 \ Section 1 Section 2 Section 8 Section 4 Section 5 Section 6 Section 7 CONTENTS. Chap. I. — Simple Eules. rA«a. o «a* ••• ••• ••• ••• *** *** *** *** *** IS «a ••• ••• ■•• #•• ••• ••• ••• ••• •• *W 26 ••• ••• ••• ••• ••• ••• ••• ••• ••• "•• ** 88 »«• ••• •*• ••• ••• ••• ••• • • • • « ••• ••• ••• ••• ••• ••• ••• ••• ••• ••• ^KV 47 Chap. II. — Fractions. Section 1 Section 2 ... Section 3 Section 4 ... Section 5 ■ •• ••• ••• ••• l*« ••• a«* •»• • • • « • • • • • I • • • • • • • • • • • ■« «•• •»• ••• ••• • •• ••■ ••• ••• ••• ••* 50 • • • • • • «M* ... 62 67 77 Chap. III. — Reduction and Compound Rules. Section 1 Section 2 Section 3 ■ • • • • • • • • • • ••• ••• ■•• ••■ 85 • •• ■•• ••• ••• ••• WO 90 ■ •• ••• ««• ••• Chap. IV. — Questions for Examination. Questions wb. Examination •• 103 CHAPTER I. FUNDAMENTAL RULES. Section I.— Addition, ExA^liES. 1. 1. Charlie had 2 cents, and he found 1 cent : how many liad he then 1 Ans. — 2 cents and 1 cent are 3 cents. 2. John has 2 dollars, and his father gives him 3 : how many has he now ] 8. Harry had 2 marbles, and Charlie gave him 6 : how many had he then 1 4. Mary had 9 pins, and found 2 : how many had she then? 5. Sarah paid 3 cents for a pen, and 8 cents for a holder : how much did she pay for both 1 6. In a class are 9 boys and 5 girls : how many are there in all 1 7' Mary paid 7 dollara for a dress, and 4 dollars for a bonnet : how much did she pay for both 1 8. Harry shot 5 pigeons, and Willie 7 : how many did both shoot 1 9. How many are 2 and 1 ? 1 and 2 ? 2 and 2 1 2 and 3 ] 3 and 2? 2 and 41 4 and 2 1 2 and 5 ? 6 and 2 ? 2 and 61 6 and 21 2 and 71 7 and 2 1 2 and 8 1 8 and 2 1 2 and 9 1 9 and 2 1 2 pence and 9 pence 1 2 days and 9 days 1 10. How many are 3 and 21 2 and 3 1 3 and 3 1 3 2 10 MENTAL ARITUMETIC. and 4 ? 4 and 3 1 3 and 5 ? 6 and 3 1 3 and 6 1 6 and 3 1 3 and 7 1 7 dollars and 3 dollars ? 3 hours and 8 hours 1 8 tons and 3 tons ? 3 tons and 9 tons 1 9 thousand and 3 thousand ] 11. How many are 4 and 3 ? 3 and 4 ? 4 and 41 4 and 5 ? 5 and 4 ? 4 men and 6 men 1 6 boys and 4 boys 1 4 yards and 7 yards ? 7 inches and 4 inches ? 4 tons and 8 tons ? 8 tons and 4 tons 1 4 hundred and 9 hundred 1 9 hundred and 4 hundred 1 12. A man Wid 9 dollars for a coat and 5 dollars for a vest : \vhat did both cost him 1 13. James si)ends 6 cents in apples and 9 cents in oranges : how much does he spend in all 1 14. A V*oy found 8 eggs in one nest and 9 in another : how many eggs did he fiTid 1 15. Willie caught 9 lobsters in the forenoon and 9 iu the afternoon : how many did he catch in all 1 16. How many are 6 cents and 8 cents 1 6 dollars and 8 dollars 1 6 dimes and 8 dimes ? G shillings and 8 shil- lings 'i 6 pence and 8 pence ? 8 farthings and 6 farth- ings? 8 pears and 6 pears ? 8 tenths and G tenths ? 8 thirds and 6 thirds 'i 17. How many are 5 and 414 and 515 and 515 and G 1 6 and 5 1 5 and 7 1 7 and 5 1 5 and 8 1 8 and 51 5 months and 9 months 1 9 tens and 5 tens 1 18. How many are 6 and 51 5 and G1 G and G 1 G and 7 1 7 and G 1 6 and 8 1 8 and G 1 G and 9 1 9 and G 1 Ifl. How many are 7 and G 1 G and 7 1 7 and 7 1 7 farthings and 8 farthings 1 8 drams and 7 drams 1 7 graiins and 9 grains 1 9 grains and 7 grains 1 20. How many are 8 and 7 1 7 and 8 1 8 tuxd 8 1 8 by ADDITION. 11 and 9 1 9 and 8 1 9 fourths and 8 fourths ? 8 tenths and 9 tenths 1 21. How many are 9 and 6 ? 6 and 9 1 9 and 7 1 7 and 9 1 9 and 8 I 8 and 91 9 and 9 1 9 thousand and 8 thousand. 22. How many are 10 and 21 10 and 31 10 and 41 10 and 61 10 and 61 10 and 7 1 10 and 81 10 and 9 1 10 and 10 1 23- A man travelled 9 miles by coach and 10 miles by rail : how far did he travel in all 1 24. John caught 7 haddock and Edward 4 more than John : how many did both catch 1 26. How many are 11 and 31 13 and 31 16 and 31 22 and 31 24 and 3 1 12 and 51 16 and 51 18 and 51 21 and 5 1 EXAMPLF-S. — 2. 1. Hov/ many are 11 and 81 13 and 81 14 and 8? 18and81 19and81 21and81 llandOl 12and91 13 and 91 15 and 9 1 17 and 9 1 19 and 9 1 21 and 9 1 2. How many arc 2 and 21 2 and 12 1 2 and 22 1 2 and 32 1 2 and 42 1 2 and 52 1 2 and 62 ? 2 and 72 1 2 and 82 1 2 and 92 1 $2 and $92 1 2 pence and 92 l)cnce 1 2 tens and 92 tens 1 3. How many arc 3 an«l 3 1 3 and 131 3 and 23 1 3 anaC31 3 and 431 3 and 531 3 and 631 3 and 731 3 and 83 1 3 and 93 1 96 and 4 1 4. How many arc 4 and 4 1 4 and 14 ? 4 and 24 1 4 and 341 4 and 441 4 and 541 4 and 64 1 4 and 741 4 and 841 4 and 94 1 98 and 2 1 g. How many avc 5 and 5 1 5 and 151 5 and 25 1 5 12 MENTAL ARITHMETIC. . I and 35 ? 5 and 45 ? 5 and 55 1 5 and 65 1 5 cents and 75 cents ] 5 pence and 85 pence ] $5 and $95 ] 6 tens and 05 tens? 6. Susan p&id 7 cents for needles, 10 cents for thread, and 9 cents for pins : how much did she spend ? 7. A. farmer paid 9 dollars for a harrow, and 19 dol- lars for a plough : how much did he pay for both 1 8. George buys 9 marbles at one time, 6 at another, and 12 at another : how many does he buy in all 1 9. A farmer sold 8 bushels of jats, 9 bushels of peas, and 9 bushels of rye : how many bushels in all did he sein 10. The head of a fish is inches long, the tail 9 inches, and the body 1 2 inches : find the length of the fish. 11. Harvey pays 5 dollars for a pair of boots, 17 dol- lars for a suit of clothes, and 4 dollars for a hat : what does he pay in all 1 12. A man had 95 dollars in a savings bank, and de- posited 6 dollars more : how much money had he then in banki 13. How many are 6 and 6 1 6 and 161 6 and 26 1 6 and 36 1 6 and 46 1 6 and 56 1 6 and 66 ] £Q and £76 ? 6 and 86 1 $6 and $96 1 14. How many are 7 and 7 1 7 and 17,1 7 and 27 1 7 and 37 1 7 and 47 1 7 and 57 1 7 and 67 1 7 and 771 7 and 871 7 and 971 15. How many are ft and 81 8 and 18 1 8 and 28 1 8 and 38 1 8 and 48 1 8 and 58 1 8 and 6S 1 8 and 781 8 and 881 8 and 981 16. How many are 9 and 91 9 and 19 1 9 and 29 1 9 and 39 1 9 and 49 1 9 and 59 1 9 and 69 1 9 cents and 79 cental 9 farthings and 89 farthings 1 $9 and |99 1 9 tons and 99 tens, ADDITION. 18 17. How many are 10 an Truro the distnnoe is 19 miles : findtho distance from Halifax to Tiuro. 6. A fijroccr paid 47 dollars for coi'n iii'.al, arid 75 dol- lars for flour : what did both coyt him 1 6 A farmer has 12 acroo in oats, 17 in rye, and 27 in wheat ; ho'v mtmy acres in t/;am ha3 ho? 7- A fisherman caught 13 coJ wn D-Tonday, 28 on Tues- day, and 59 on We Imsday : how many did iio ca^-ch in the three d;iYs'i 8. 734- 17 + 3 -.- 7 4-10 are hr.w many 'i 9. Willie gave 57 cents to ''A^ sisti r, and had 6i> cents left : how many had he at first? 10- Brampton is 28 miles west of Trronto, and Bow- manvillo 43 miles cast : find the distance between Brampton and Bowman villo, 11. A man bei.'an busin»^ss with 28 thousand dollars, and in 10 vcait) cleared 68 thousand dollars: how much was In- th«*n worth ] 12. A man bought a cow f r 25 dollars, a calf for 5 dollars, 3 lambs for 8 dollars, and a pig for 2 dollars: what did he pay for all 'i? 13. A horj^e is worth 85 dollars, and a waggon 35 dollars ; what is the value of both 1 ADDITION. 17 14. Lucy bought a bonnet for 3 dollars, a silk dress for 111 dollars, and a shawl for 29 dollars: what did she pay for all] 15- Thore are 31 days in January and 28 in February : how many days in both ? 16. An orchard contains 15 cherry-trees, 37 plum- trees, and 45 apple-trees : how many trees are in the orchard 1 17. A lady bought some tape for 10 cents, some pins for 18 cents, and a pair of scissors for 30 cents : how much did she pay for all ] 18. A merchant bought a horse, saddle and bridle; for the horse he gave 75 dollars, for the saddle 25 dollars, and 7 dollars for the bridle : what did they all cost him 1 19. From Toronto to Wliitby is 20 miles, and from Whitby to Fort Hope is 33 miles : what is the distance from Toronto to Port Hope 1 20. Bath is 18 miles from Kingston and 36 miles from Belleville : how far from Kingston to Belleville i 21. Cobourg is 72 miles fioiu Toronto and 103 miles froi)i Kingston : how ftir from Toronto to Kingston ? 22. From Montreal to Cornwall is C8 miles and from Cornwall to Kingston is 105 miles: what is the distance from Montreal to Kingston] 23. Oshawa is 33 miles from Toronto and 300 miles from Montreal : what is the distance from Montreal to Toronto ] 24. John hoes 19 rows of potatoes, James 31 rows, and William 48 rows : how many rows do tliey all hoe ? 25. A grocer mixes 3 pounds of tea worth 12 shillings^ with 4 pounds worth 2u shillings : how many pounds are there in the mixture ] 18 MENTAL ARITHMETIC. 26. A person sells 6 apples for 1 2 cents, and 9 others for 15 cents ; how many ap})les does he sell, and wha* does he get for them ? 27. James and Robert had equal amounts of money in the morning ; during the day, James lost 6 dollars and Robert gained 9 dollars. In the evening, who had the larger amount, and how much larger 1 28. A father divi.led a certain numbor of oranges be- tween his wife, 2 sons and 3 daughters. He gave to the youngest son 5, to his wife 7, and the rest he divided equally between his three daughters and oldest son. The eldest son's share was 5 more that his mother's. How many oranges were divided 1 29. A father divide I a certain number of apples between his three sons; to the first he gave 11, to the second 4 more than the first, and the third 7 more tlian the second : how many apples had he ] Section II.— Subtraction. Examples. — 5. 1. John had 3 cents and gave his brother 1 : how many had he left? Ans. — The (Uiforence between 3 (that is 1-f-l-f^) and 1 is 2, therefore ho had 2 left. 2. A boy had 5 apples and gave away 3 : how many had he left 1 8. Jennie had 8 needles and lost 5 : how many had she remaining ? 4' Rufus canght 9 trout and gave Charles 3 : how many had he left? SUBTRACTION. 19 6. How many are 3 and 21 2 from 5 ? 3 from 5 1 6* How many are 5 and 4 ? 4 from 9 ? 5 from 9 1 7. How many are 6 and 3 ? 3 fiom 9? 6 from 9 ? 8. How many are 6 and f) 1 5 from 111 6 from 1 H 9. How many are 4 ai)d 71 4 from 111 7 from 11? 10. How many are 4 and 10 ? 4 from 14 ? 10 from 141 ^ . ll.~How many are 8 and 5 1 5 from 13? 3 from 13 ? 12. How many are 5 and 9 ? ;> from 14? 9 from 1 4 ? 13. How many are 7 and 10? 7 from 17? 10 from 17? 14- I paid 15 cents for oranges and 9 cents for ap- ples : how much more di then down 3, then down 1, then up 9 : what stop from the top and bottom does he stand upon 1 10. If a nian who has $44 earns $27 more, and then spends $43, how much has he left 1 11. A certain boat has a crew of 18 men, and 79 pas- is* 1 «1 r ;AH sengers if 59 leave, how many are left aboard 1 24 MENTAL ARlTHMEi'IC. 12. A and B start from two places, 96 miles apart, and travel tows^jrd each other. The first day, A goes 48 miles, and B 27: how luany miles are they then apart 1 How far is A from B's starting place 'I How far is B from A's starting place 1 13- Two men bought a horse, the one jmys 75 d liars, and the other 29 dollars less : how many dollars did both payl 14- From Toronto to Thornliill is 1 2 miles, from Thorn- hill to Richmon 1-hill is 5 miles : how far from Richmond- hill to Aurora, the distance from Aurora to Toront'- being 31 miles'? 15. John bought a watch for IT* dollars, and a chain for 9 dollars. He sold them both for 29 dollars : how much did ho gain ] 16. William and James start from the same point ani travel in the same direction, the one at the rate of 13 miles, and the other at the rate of 7 miles : how fur ii\mvi will thev be ? 17. On January 7th, how many days yet remain in the month 1 18. Mary was born years before Ann; Mary is 21 years old : how old is Ann ? 19. How many is 90 — 50 1 Ans. — 90 is 9 tens, and 50, 5 tens, 9 tens -- 5 tens are 4 tens, or 40. 20. How many is 75 — 25 ? 92 — GO 1 vS7 — 40 ] 98 — 70? G7 — 42] 84 — 43] 90 — 3G] 80—55/ 21. How many is 75 — 37 ? jifis^ — 75 is G0-[-15 and 37 is 3 -}-7, therefore the diflerence is 60— 30 -f- 15 — 7, which is 30+8 or 38 or 75 — 3c is 45, and 45 -^ 7 is 38. SUBTRACTION. 25 22- How many is 46 - 89_74'? 43 — 28] 52 35 ? 57 — 38 ] 39 — 19 1 -271 67 — 391 84 — 651 23. To the number 10, add 10 and subtract 5, add 6 and subtract 10, add 12 and subtract 6, add 6 and sub- tract 12, add 20 and subtract 10, add 20 and subtract 10, and give the result. 24. There are 65 schohirs in a .school, and 30 of them are girls : how many boys are there 1 25- A merchant bought 67 quintals of codfish, and in a week had sold all but 35 quintals : how many did he sein 26. A man began business with 42 thousand tlollai*s, and in 5 years lost 22 tliousanl : how much had he leftl 27« Edgar had 10 peaches, he gave 7 to Mary and 6 to Minnie : Hov/ many had he left 1 28. IJouglit goods to the amount of 29 d liars : for how much must I sell them to gain 13 .loUarsI 29- A bin has in it 55 bushels of oats, 23 bushels are taken out of it at one time and 9 busliels at another : how many bnshcls are leftl 30. Find result of 22 ~ 8-f 13 — 6+4 — l+7-|-9 — 20, and also of 86 + 14+20 — 15 + 10 — 30. 31- Joline?nnocl 80 cents one Jay, and spent 30 cents of it, tlie next day he earned 50 cents : how much had ho tlicn ] 32. 9 tenths — 3 tenths? 8 Iwcllthb — 4 iweUthsl 23 liueentlis — 15 lifteenths 1 26 MENTAL ARITHMKTIC. Section III— Multiplication, Examples. — 8, I. Wliat will 2 apples cost at 4 cents each '» Ans. — 1 Ap[)lG costs 4 cents, therefore 2 will codt 44-4 that is 2 times 4 cents or 8 cents. 2- What will 2 oranges cost at 5 cents each 1 3- A man earns 8 dollars a week, how much will he earn in two weeks 1 4. How many is : 2 times 1 2 times 4 2 times 7 2 times 10 5 times 2 2 times 2 2 timen 5 2 times 8 2 times 11 8 times 2 2 times 3 2 times 6 2 times 9 2 times 12 10 times 2 5. Find the cost of 2 barrels of mackerel at 12 (ljllar»i a barrel, 6. What is the cost of 4 yard's ■ f tape at 3 ceuts a yard l at 4 cents % at 5 C(.'nt.s 1 7. How many is : 3 times 1 3 times 4 3 times 7 3 timos 10 8 times 3 3 times 2 3 times 5 3 times 8 3 times 11 11 times 3 3 times 3 3 tiuics 6 3 times 9 3 times 12 12 times 3 8. What will 3 barrels of Hour cost at 7 dollars a barrel 1 9. A man earns 3 dollars a day, how much will he earn in a week 1 10. Find the cost of 12 yards of calico at 3 pence ncr yard % II. What will 4 pounds of rice cost at 6 cts. a pound ? at 7 cents'? at 8 cents 1 How many is : 4 times 1 4 times 4 4 times 7 4 times 10 2 times 4 4 times 2 4 times 5 4 times 8 4 times 1 1 5 times 4 4 timcB 3 4 times G 4 times 9 4 times 12 8 times 4 MULTIl»L:CAriuN. 27 12. What will 4 pounds of g i^av cost at 11 cents a I KHitid] 11 cost ^ill he .imes 2 iimes 2 /imcs 2 (I jllai'fi CO fits a lines 3 iinea 3 Imos 3 lars a 10 cam nco ncr )ouud 1 times 4 times 4 times 4 13. Mary bought 4 yards of cotton at 9 cents a yard : what did it cost herl 14. I piiid 4 dollars a day for a team and kept it 10 days : what did it cost me 1 15. How many iz 5 times: \ l 21 31 41 0l 61 71 81 y 1 101 11 1 12 ? How many is 8 times 5 1 6 times 5 1 7 times 5 ? 9 times 5 tenths 1 4 times 5 tens 1 7 times 5 Imndreuths 1 18. t'ind the cost of 5 cords of wood at 6 dollars a cord 1 17. boys received 11 apples each : how many did tiiey all receive 1 18. At 5 cents a pound, what will 7 pounds of rice .mi 1 8 lbs. 1 9 11)8. 1 10 lbs. 1 1 2 lbs. 1 19. How many is G times 11 21 31 41 51 Q1 71 81 91 11 111 121 2 tin«1 5 tensi 7 tjilnlsl 8 fourths 1 20. 1 piiid G dollars a ton for 9 tons of coal : what was the whole cost 1 21- Jane bought 1 1 yards of cotton at C pence per yard : what did it cost herl 22. How many is 7 times 11 21 31 41 51 61 71 8? 91 101 111 121 2 pence 1 3 shillings 1 4 tenths 1 23. A merchant averages a profit of 12 dollai-s a day : how much is that a week 1 24" A merchant bought 7 quintals of codfish at 5 dol- lars a (juintal : what did he pay in all 1 25. How much will 8 yards of silk cost at 9 shillings a yard 1 9 inches of gold wire at 7 pence an inch 1 86. How man 7 is 8 times 11 21 31 41 51 61 m 28 MENTAL ARITUMFTIC. 7? 81 9? lOi 11? 12« How much is 12 times 8] 7 times 8 ^ 27. i^^ind the cost of *^ 2)a of sugar at 10 cents per [)Ound ? Of 8 barrels of flour at. "^ dollars a barrel ] 28. A steamer sails 12 miles an hour for 7 hours: what distance does she make 1 29. What will be the cost of d lbs. of cheese at 8 pence a pound t 9 yards of cotton at ^ pence a yard ? 30. How many is 9 times 1 ? 21 3 ? 4 ? 51 6 ? 7? 8? 91 10? 1). 1 12] How many is 8 times 91 7 times 9 1 31. How many incher^ are in 9 feet, there being 12 inches in one foot 1 32. A farmer make? an avei'age profit of 11 dollsirs an acre : what profit has he ofi' 9 acres of land 1 33. How many is 1 times 11 21 31 41 51 61 71 81 91 101 HI 121 How many is 9 times 10 { 8 times 10] 34- What will 10 lbs. of butter cost at 9 cents a pound? at 10 cents 1 at 11 cents 1 35- Whit will yards of muslin cost at 11 cents a yard 1 36. How many is 1 1 times 1 1 21 31 4? 51 61 71 81 91 101 111 12 i ;12 times U1 9 times 111 7 times 111 37. Find the cost of 11 yn-ds of ribbon at 11 cents a yard 1 10 quintals of codfish at 4 dolhirs a quintal? 38 1 bou, tUvide by 8, multiply by 6, subtract 10, divide by 5, add 2, multiply by 11, and what will the product be 1 7- The divisor is 5, the dividend 39, the quotient 7, Find the remainder. 8. The remainder is 5, quotient 6, divisor 7. Find the dividend. 0. How many sets of factors in 24 ? in 48 1 in GO ^ in 125? 10. By what number must the product of the sum and difference of 9 and 7 be increased so that the result may be exactlv divisible bv 7 1 II. A man bought an equal number of pigs and sheep for $63. Each pig cost |3, and each sheep $4 : how many of each did he buy 1 MISCELLANEOUS QUESTIONS. 39 12- A woman bought 26 yards of dress g'lods at 30 cents a yard, and 22 yards of cotton at 10 cents a yard : how much change did she receive out of a $10 )»ill ? 13. There is a number whirh, when divided by 4, and the quotient increased by 9, tlie sum multiplied by 3, and tlie product decreased by the difference between the arith- metical complements of 4 and 7, gives 33. Find the number ? 14- If 3 corls of wood are worth 18 dollars, and 10 cords are given for 12 thousand shingles, how much .irc tlio Khingles a thousand 1 15. if 3 ])o\mds of Hour are worth 1 pound of sugar, and 6 pounds of sugr.r are worth 1 pound of tea, hi/W many pounds of flour are worth 2 pounds of te 1 1 16. A boat sailed up river for 10 hours at the rate of 3 uiih's an hour, r)ut returned over the samo veirths ? 12 twelfths ? 14. One half a numher is 10, what is the nunihor? Sot. — J^ince one half is 10, tiro hulves, or the whole number, is 2 times 10 or 20. 15 One fifth of my a^v is 6 years : how ohl am I? 16. What is tiie nu rubor whose sixth part is 10? The number whose seventh part is 8 ? The number whose ninth part iy 9 ? The number whoso tenth part is 10? 17. The rent of a ho\ise for a certain time is $60, what is the rent for one-sixth of the time ? for 2 sixths ? for 5 sixths ? 18. A man has 630 a month, and saves 2 ninths of it: how much doe.; he save in 12 months? 19. OncvHPvcnth of the money I have is $12 : how much have I ? . 20. H 22 is ^;^ie-sixth of the value of a horse, find his value ? 21. What is 5 eighths of 16 yards? of 16 dollars? of 16 cents? of 16 years? of 16 days? of 16 pence? of 16 farthings? of 16 hundredths? 22- There aic 12 months in a year, how many in one- sixth of a year? in 2 sixths? in f) sixths? 23. One pound ol checbc costs 18 cents, what will ono- ANALYSIS. 43 half pound ooet 1 one-third of a pound 1 5 sixths of a pound. 24. Five-sixths of 72 are how many times 6 ] how many times 12] how many times 101 25- James is 16 years old, and 3 fourths of his age is 6 sevenths of Harry's : how old is Harry ] Examples. — 14. 1. If 3 oranges oost 15 cents, what will 7 oranges cost 1 Sol. — 3 Oranges cost 15 cents, one will cost one- third of 15 cents, that is 5 cents, therefore 7 ■will oost 7 times 5 cents, or 35 cents. 2. If 7 apples cost 14 cents, what will 11 cost? 3. If mackerel cost 81 cents, what will 12 cost"? 4. If 15 yai*ds of tape cost 45 cents, what will 8 yards oost? 6. $84 are paid for 12 barrels of herring : what would bo the price of 10 barrels ? 6. If six men can mow 1 2 acres of grass in a day, how much can 13 men mow in the same time? 7. If 3 apples arc worth 6 oranges, how many oranges are 20 apples worth % 8. If 8 dollars will buy 80 yards of cotton, how much will 11 dollars buyl 9. When 60 cents are paid for 4 dozen of eggs, how much must bo paid for 7 dozen? 10. If 50 cents will pay for 5 lbs, of sugar, how much wilj 120 cents buy? Sol. — 5 pounds cost 50 cents, 1 pound 10 cents, and if 10 cents buy 1 pound, 120 cents will buy 120-f-lO, that is 12 pounds. t ri 44 MENTAL ARITHMETIC. ' I ' ■ ' ■ i •' ■ I 11. If 8 men buikl a wall in 6 days, hov. many would build it in 12 days ? 12- When $80 is paid for 8 barrels of mackerel, how many barrels will $110 pay for ? 13. If 8 yards of calico can bo bought for 9G ponro, how much can be bought for 132 pence 1 14. If 4r men do mow a field in 12 days, how long would it take G meni iiiol. — 4 men do it in 12 days, therefore 1 man will do it in 48 days, and 6 men will do it in one- sixth of 48 days, or 8 days. 15. How long would it tako 11 men to do wliat 10 -1 ' i • ould do in 11 days? 'If^:. :'10 cents will buy 5 herrings, liosr much will 40 iienvUiTS cost] /7 Wir. '•--yards of broatMoth can be bought for 20 doliari:, h:.. >di will $56 buy? 18. If 8 copy-books cost 80 cents, wliat will 40 copy- books cost. Sol. — Since 40 is 5 times 8, 40 books will cost 5 times what 8 cost, or 5 times 80, thtij is 400 cents. 19. What will 15 oranges cost, when 3 cost 11 cents? 20- How many dozen of oggs can bo bought for 90 cents, at the rate of 2 dozen for 30 cents ? 21. What will 21 pounds of rice cost, if 13 pounds cost G5 cents ? 22- How much will 40 barrels of Hour cos-., v/hcn 5 barrels cost 2C dollars ? 28. How much honey at 12 cents a pound must be given for 4 pounds of coffee at In) cents a pound 1 24. What is the cost of 30 yards of cloth at the rato of 5 yards for 9 dollars 1 ANALYSIS. 45 25- If 12 men do a piece of work in 10 hours, how long would it take 8 men to do the same work 1 26. If a steamer make 48 miles in 4 hours, how long will it take her to make 72 miles] 27. If 3 fourths of a number is 1 2, what is 6 times the number ? 28. If 4 fifths of a pound of tea cost 60 cents, what will 2 pounds cost? 29. If 10 horses eat 30 bushels of oats in 6 days : how long will the same quantity last 15 hvrses 1 30. What will 3 fifths of a pound of tea cost, at 60 cents a pound ? 31. Charlie gave 7 apples for 21 marbles : at this rate how many marbles ought he to get for 9 apples 1 32. How much will 5 bushels of apples cost, if 5 eighths of a bushel cost 40 cents ? 33. 3 tenths of the distance from Yarmouth to Digbj is 21 miles: find the whole distance? 34. A man gave 16 bushels of wheat for 3 barrels of flour : what was the wheat worth a bushel when $60 would buy 12 barrels of flour? 35. Frank has 60 cents, and 7 tenths of this sum is equal to 6 sevenths of what Willie has : how much has Willie? 36. A man paid $40 for a chain, which was 2 ninths of what his watch cost : find the cost of the watch ? 37- A farmer has 36 geese, and 7 ninths of the num- . ber of geese is 4 fifths of the number of turkeys : find the number of turkeys ? 38. John has three times as much money as Edward, and both have $16 : how much has each ? Sol. — John has a certain sum and Edward has 3 It ■ I • 46 MENTAL ARITHMETIC. m 'If-!;' 1 > M 1; I 1 i times this sum, therefore both together have 4 times John's money, or $16, and therefore John's is $4, Edward's $12. 89. A lot and house cost $900, the house cost 8 timea as much as the lot : find the cost of each 1 40- Edwin is twice as old as Edgar, and their united ages is 30 years : find the age of each 1 . 41- A horse and cart c- st $108 ; the horse cost 5 times as much as the cart : find the cost of each 1 42- 72 cents are divided between Harry and Charlie, for every 4 cents Harry receives, Charlie gets 6 : how many does each receive 1 Sol. — Oi every 9 cents Harry gets 4 and Charlie 5, but 9 is contained 8 times in 72. therefore Harry gets 8 times 4 cents and Charlie 8 times 5 cents. 43- Divide 60 marbles between Willie and Eddie, so that forevery 2 Willie gets, Eddie shall get 3. 44. Divide $132 between Minnie and Susie in such a way, that as often as Minnie gets $4, Susie shall get $7 % ' 45- A newsboy saves 104 cents in 8 days : how much will he save in 30 days at the same rate ? 46. Tf it take 20 yards of calico to* make 2 dresses, how many similar dresses will 110 yards make? 47- A boy laid out 80 cents in oranges at 4 cents each, and sold them so as to gain 40 cents : find how much he got apiece for the oranges 1 48- On a certain holiday William caught 11 trout as often as Cluirles caught 7 ; William cauijht 55 : how many did Charles catch 1 49. Frank laid out 60 cents in apples, giving 5 cents ^or every apples; he kept a number for liimself and gave \ ANALYSIS. 47 an equal number to each of 8 class mates : how many did each receive 'i 60* If 9 barrels of flour are worth $63, how many barrels of apples at $3 a barrel can be had for 6 barrels of flour '? 51. A newsboy b»yught 9 papers at 3 cents each, and 8'others at 4 cents each; he soM all the papers at a uniform price, and gained altogether 26 cents : find what he re- ceived for each pa[>er 1 52- If $100 will support a family of 7 persons for 8 weeks, how many persons would it support for 14 weeks ? 53- Two-thirds of 36 are 3 times what number 1 4 times what number 1 6 times what number*? 8 times what number] 64^ Eight-ninths of 81 are 6 times what number? 8 times what number 1 9 times what number ] 12 times whiit number? 55- Four fifths of 60 are how many times 6 1 how many times 8 1 Ten-elevenths of 55 are how many times 5] 10] 25] Section VII.—Highest Common Factor, &c. Examples. — 15. 1. What numbers multiplied together will produce 8 1 10] 16] 35] 48] 40] 4)] 51] 42] 2. Resolve into factors, 15, 20, 25, 33, 36, 40, 50. 3- WliMt factors have the following numbers : 2, 3,5, 7, 11, 13, 17, 19, 22, 23, 27, 32] 4. Name the prime and the composite numbers in the following, 24, 25, 27, 28, 29, 30, 31, 34, 35, 37, 36, 39, 41,47,541 '/»' 48 MENTAL ARITHMETIO. §;■ n i ; i; 6. Wliat are the factors of 6 *? 91 12? 151 101 181 211 321 331 351 391 491 511 6. V^h&t are the prime factors of U1 541 561 601 671 681 701 751 761 7. Name the divisors which are common to 8 and 10 ' 12 and 16 1 10 and 30 ] 9 and 36 1 24 and 36 1 8. Find the liighest common factor of 8 and 24, 36 and 27, 32 and 48, 37 and Q8, 18 and 80 1 9. Find a common multiple of 2 and 3, 5 and 6, 4 and 8, 9anJ 12, 32 and 481 10- Find the least common, multiple of 8 and 12, 9 and 12, 12 and 20, 16 and 48, 10 and 35. 48 and 96 1 11. What is the square of 11 21 31 41 51 6? 71 81 91 101 111 121 131 161 141 201 12. Find the cube of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. 18. What is the square roo< of 11 41 91 161 251 361 491 811 641 1001 1441 1211 14- 5 times the square of a number is 320 : find the number 1 16- If the square ro'^t of a certain number be divided by 6, the quotient is 2 : 6nd the number. 16- If 1 1 be added to Harry's age, and 1 is added to 5 times the square root, J of the sum will be nine : find his age. M I f Highest Common Factor and L. C. M. Examples — 16. 1. What is meant by Common Factor, Highest Com- mon Fact<^r1 2. Find the H.C.F. of 4 and 6, 7 and 14, 8 and 12, 27 and 36, 56 and 14. ..-^ ' il HIGHEST COMMON FACTOR AND L. C. M. 49 a Find the H.C.F. of 2, 4, 6, 8, and 12 ; of 5, 15, 25, and 39. 4. What is meant by the multiple of a number t whnt by the L.C.M. of two or more numbers 1 5. Find the L.C.M. of 4 and 6 ; 9 and 12 ; 8, 16, and 32; 4, 6, 9, 18, and 36. 6. Find the L.C.M. of 2, 4, 6, 8 and 12; 5, 15, 10, 20 and 30 ; 3, 6, 9, 24 and 36. 7. A farmer wishes to put 24 bushels of wheat and 36 l)ushel8 of silver chaff into the least number of bins that shall contain the same number of bushels without mixing the two kinds of wheat : what number of bushels must each bin hold, and how many bins will be required? 8. A gentleman has a triangular plot, the sides of which are 63, 84, and 105 feet, wishes to enclose it with boards of uniform length and greatest possible : what will be the length of each board 1 How many boards will be required if it be 4 boards high all roundl 9. A, 6, and C agree to purchase pigeons at the high- est price each that will allow each to invest all his money ; A has 45 cents, B, 60, and C, 76 : how many can each purchase 1 10. A can dig 4 rods of a ditch in a day ; B, 6 ; and C, 8 : what is the least number of rods that will furnish a number of whole days' work to any of j, the three men 1 11. The fore wheel of a perambulator is 3 feet in cir- cumference and the hind wheel 5 : what distance will be passed over before they are in the same relative pos- ition as at first 1 12. The IT.C.F. of two nura>>ors is 2, and the L.C.M. is 12 ; one of the numbers is 4 : what is the otherl 13. The H.C.F. of three numbers is 2, and their i ■ '. ! ■! f I .'r! If I 50 ) i," 'l{ <|!^ 'i'' MENTAL ARITHMETIC. L.C.M is 60; the first number is 4, the second 2 more than the first : what is the third 1 14. Find the least number which, divided by 3, 5 and 7f leaves 2 for remainder in each case. 15. What is the smallest sum of money with which I can buy rabbits at 25 cents each, pigeons at 15 cents each, and hens at 30 cents each 1 16. A boy can dig 12 post holes in a day ; hir ^"^ther can dig 18 : what is the smallest number which .^i fur- nish exact number of days' labor for either alone or both together ^ 17. What is the least number which, divided by 3, 5, 7, 9 and 15, will leave 1 for remainder 1 18. What is the greatest and what the least number that can be subtracted an exact number of times from 551 19. What is the greatest and what the least number that can be subtracted from 153 an exact number of times 1 CHAPTER n. Section i.— Fractions ■* '• INTRODUCTCRY. Examples. — 1. 1. If anything, as a foot, a dollar, a pound, a number, (fee, is divided into two equal parts, each part is one-half of the thing divided; if it is divided into three equal parts, each is one-third, and two of the parts are two-thirds ; if it is divided into four equal parts each is one-fourth^ two of them are 7J5 ' in^Vu^ inlgfl in |5f 1 What is the Unit OF THE Fractions in $| *? £ J 1 4 ^i-^^^® "^ I ^"^® '^ | ton 1 11. What are all the fractional units, as far as 20 1 What is the fractional unit corresponding to the number IQI to 30? to 451 tr 49? to 50 1 to 5001 12- Willie gave away ^ of an apple : how many thirds had he left 1 How many eighths of a yard in a yard ] How many tenths of a dollar in a dollar 1 How many sixteenths of a pound in a pound ? 13. How much does | lack of 1 1 How much does ^ lack of 1 ? How many twentieths must be added to ^^ to make it equal to 1 ] 14. Take § from 1 and what i.. left] Take j\ from 1 and what is left] 15. Which is the greater, one-half or one-third 1 One-sixth or ono-fifth 1 One ninth or one-twelfth 1 One twentieth or one-thirtieth 11 16. A horse cost $100, and a sleigh | as much : Find the cost of the sleigh. 17. A man sold ^ of a piece of cloth which contained 46 yards : How many yards were left 1 18. If A can dig a ditch in twelve days, what part of ii can he dig in 1 day 1 in 5 days ? in 7 days 1 FRACTIONS. 6a 19- If B can dig a ditch in 10 days, what part of it can he dig in one day 1 in 5 days 1 in 9 days 1 20. If a person leaves his property, woi-th $1800, to his wife and 8 children, in equal parts, what fraction of the whole will each have, and how many dollars? 21. What is the ^ of 18? of 18 shillings 1 of 18 pence"? of 18 days 1 of 45 farthings ? of 45 homs. What is the ,2 of 3G seconds'? of 3G ounces 1 of 3G t(,'ns 1 of 3(i tenths Tof 36 twelfths'? of 30 fiftieths'? 22. I owned ^^' of a sliij), and sold ^ of my share : how many sixty-fourths had I left 1 23. If you put up ten pounds of tea in packages of one |)Ound, what part of the whole do you put in one pack- age ? in 3 packages 1 in 7 packages "? 24. 1 is what part of iO"? of 5? of 15 1 of 91 One-seventh is what j)art of 2-sevenths '? 4-sevenths? 5- sevenths? 6-sevenths ? of 5 '? of 16'? One-nineteenth is what part of -^ 1 {'g 1 [§ 1 pg ? | ^ "? 3 is wiiat part of 1 "? 25. A person having $85, earned $115 more, and then gave away one-fourth of what he had : how much did he give away : how much did he retain 1 26. Jane has 1 of a dollar, and Hany and James have each I of a dollar : how much more hfive these than Jane 1 27. If 4 pounds of almonds cost 80 cents, what jmrt of 80 cents will one pound cost "? 2 pounds ■? 3 pounds ? 5 pounds ? 7 pounds '? What part ol" 1 2 is 7 ? 91 1 5 ] 28. What is 1 -seventh of 2^0 1 i^? ^i? 1^1 1,-; 1 29. What is 2-sevonths of J J 1 3-sevenths ? 5-8ev- enths 1 6-sevenths ? 1 3-sevonths '? 30. If 12 oranges cost 36 cents, what part of 36 uent^ 54 MENTAL ARITHMETIC. ^1' ^? 1: will 1 orange cost 1 2 oranges 'i 3 oranges 1 5 oranges 1 8 oranges? 31. In a certain High Scliool there are 12 boys anJ of 201 36. 3 sevenths of 21 are how many times 3 1 Sol. — 1 -seventh of 21 is 3 ; 3-sevenths of 21 is 0, which is 3 times 3 ; therefore 3 sevenths of 21 is 3 times 3. 37. 3-eighths of 24 are how many times 6 1 4-fiftha of .f 15 are liow many times $3 ? | of 15 tenths are liow many times 3-tenths1 | of 15-tweutietlis are how many times ^\^ 1 7-ninths of 27 are how times 9 1 38 Fi'G 1 had $G0 ; J of it he spent for a watch, and I of it for a suit of clothes, how much had he remaining? 39- A ]>ole whose length is 15 feet is in the air and water, and 'j of the whole length., less 3 feet, is the length in the water, recjuirc*! the length in the air 1 40- 'I'he interest on $G00 for G years is equal to J of the principal : how much was the yearly interest? 41. What will 3-fourths of 8 pounris of coffee cost at 20 cents a pound 1 42. A is worth $2,400, and 5 sixths of A's fortune is 10 times the interest on B's fortune for a year : what is the interest on B's fortune 1 FRACTIONS. 55 43 A road 160 miles long is composed of 10 equal soctions. What fraction of the whole road are 6 of these sections, and how many miles do they contain 1 44. If the rent of a house for 30 days is $90, how mu';h will it be for 17 days? 45- The site of a sch ol cost $700 ; and 4-sevenths of this $100 is 1 -eighth of the cost of the building : required the cost of the building 1 < :i Section II.— Reduction and Analysis. of Examples. — 18. 1. How many fourths in 4| '? aSW. — 4j=4-|-j ; in 4 there are 16 fourths, there- fore in 4-|-| there are 16 fourths-}-^ fourths, or 19 fourths, that is -\K 2. How many thirds in 3J ? 4^'? 5J ? 6§? 13J1 8. How many fifths in 4^ ? 3| i 7^ 'i 8| ] 4. How many sevenths in 7^ 1 inS'^l in 10? 1 in 1 If 1 5- How many ninths in 1 J i in 2*5 I in 4^ i in 5|'? 6. By how much is 4^ greater tlian 3 J ? than 2| 1 7. What is the result ir. f) />. _ 1 J<- -f 6 ,4. — 4/^1 8. How many tenths in 3 ^\^ 1 in 2 ,-q 1 in 4 ,•*) i in r,,i,? in 7,^,/; 9. How many twelfths in 2X1 in 1 ,H, ? 33? in 10- How, then, are mixed numbers reduced to improper frdcflona ? 11. Reduce to improper fractions 3^ 42, 6§, 5|, 9 J, 10 •» m PI 66 MENTAL ARITHMETIC. •' *. ;t ! *! ' rf i '■,* 4 ' r i , i i:.. "■t j V, .« -r.j * I. 1 ri 4- i j'l< •si m\ 12. Reduce to improper fractions ly^^^, 2/j, 3 ^%, 1 j^^, 18. How many fourths of a dollar will 7 yards of cloth cost at $2 1 a yard 1 ;^ol.—2l=-\^ and 7 times V ^V- 14. How many thirds of a dollar will 9 barrels of flour cost at $G'l a barrel 1 16. What will ten yards of cloth cost at $2j a yard ! 16- What will 10 lbs. sugar cost at Gj; cents per pound 1 at 7i cents ? A^ cents 1 17. What will 7 yards of cloth cost if 2 yards can bo bought for $C| ? 18. If 9 felt hats can be bought for $11 1, how much will 8 hats cost 1 19. [f 3 J tons of coal cost $00, what will 4 tons cost at the same rate l 20- How much will 14 lbs. of raisins cost when 3.| lbs. cost 50 cents'^ 21. 2i^ yards of muslin cost 48 cents: what will 10 yards cost at the same rate ] Fractions. — Reduction. UNITS. Examples. — 19. 1. How many units are there in ^ 1 Sol. — 2 halves make one unit, and 7 halves contain 2 halves 3 tiuies with o?ic-half remainder .*. in ^ tliere are 3J units. 2. How manj; units in ^ ? in ?] 1 in y^^- 1 in J 1 in £•' in to r,3 in FRACTIONS. — RfiDUCTTON. 57 3. How many units in ^^^ 1 in ^>i* 1 in $'^5. ] in 4. How many units in Y? in 5^--? in y 1 in ?J 1 infgJ 5. How, then, may any improper fraction be reduced to a mixed number ] 6. Keduce to mixed numbers V , V* V» '^^Z' -^^V? '/ sliillings, -M-. Reduce to mixed numbers '^^ pence, **," hours, ^/- seconds, ?3 fartliings, ?}}, V^, ?f, VY- 7. At $6-^ a barrel, what will 12 ))an"els of Hour cost] 8. If 2 dozen of ^.gga cost 28 j cents, what will 3 dozen cost] 9. I paid $9 for 2j ]«arrela of apples, what will 5^ barrels cost at the same rate? 10- If ^ of a pound of tea cost 48 cents, wliat will 1 lb. cost] 2 lbs. ] 3 lbs. ] 4 lbs. ] 3J lbs. ] 4^ lbs. ] 5 J lb8. ] 11. If I of a ton of hay is worth $4 J, what will 7"^ tons cost ] 12. A man walks 7 miles in 2 J hours : h w far will he walk in 4'j hours ] 13. Find the number of bows, each containing ^ of a yard of ribbon, that can be made out of 7;] yards. 14. At a church collection 43 dollars, 24 half dollais, and 32 q\iarters were received : what was the whole amount ] 16- » pint is one eighth of a gallon : how many pints in 13^ gallons] How many gallons in 141 pints] 16- If a boy can split J of a cord of w od in a day, how long will he take to split ^ of a cord] J ] 1 cord ] 2 cords ] 8 cords ] 17. How many quarter-pound weights will it take to 58 MENTAL ARITKNfETIC. ■A '. U' , Kalance 56 pounds weight] How many half-pound weights 1 18- How many lots ,\j of an acre in size can be laid out of 5 acres'? from 7 acres 1 fiom 2,'^g 1 19. If a mail can do I of a piece of work in 2 hours, Ih'w long will it take him to Jo the whole 1 20- If a boat is 3 hours in performing I of its trip, how long at that rate will its whole trip take 1 21. If a locomotive can go six miles in I of an hour, how many miles can it go in one hoiir ajid a half] 22- With $24 collected from one customer, $10 from another, and $11 from a third, a pei*son paid jj of his taxes : what did his taxes amounfto ] 23. 74-84-5 + 4, is.' of what number] -^j 4- -S^ 4- J^^ 4" pT is .' of what number] 24. 5 is a third of how many times 6 ] Of what num- ber is 3^ one-seventh ] One-ninth] One-twelfth ] 25- If a fifth of a yard of carpet cost two-fifth of a dollar, what is that a yard] How much would $27 J buy] 26. If a ninth of a pound of raisins cost 2 cents, what will 4 ninths of a pound cost ] What will 3§ pounils cost] 27. A man being asked the value of his horse said, $^\['- is one-tenth of its value : what is its value ] 28. 9? is a seventh of what number] 5| is 1 -fourth of what number] 77j is 1-ninth of wliat number] 29. 18 is 1-half of G times what number] 30- 15 is 1-sixth of 5 times what number] 31. A wagon cost $C)0^, which is 1-fourth the cost of the buggy : what was ^lic cost of the bujrgy ] 32. 7| is \ of what number ] J of what number 1 th( vai f! 1 l PRAOTIONS. — REDUCTION. 59 83- A man being asked his age, said his youngest son's age, which was 15 years, was just one-eleventh of 3 times his age : what was his age 1 34- A lady's shawl cost $9, which was 1 -eighth of 4 times the cost of her dress : what was the cost of the dress 1 35. A honse cost $800 which was 1 -tenth of 4 times the value of the farm on which it stands. Required the value of the firm 1 36- 2 thirds of 21-j-3-fourths of 16, are how many times 7 1 37' 3 sevenths of 21-f-3 eighths of 40, are how many times -^ 1 38. If 3g lbs. of butter cost 60 cents, hov^ much can be bought for 360 cents ? 39' i of 21 is ^ of what number 1 | of what number ? 40. 2-f-8 — 3 is I of what number] 41. 7 of 56 are how many times 8 1 42. How many fifths in 4 1 In 4| 1 How many sevenths in 3*? In 341 How many ninths in 3? In 3^] How many tenths in 4 ? In 4| ? In 2J? In 31? 1 Fractions.— Reduction, &c. Examples. — 20. 1. In J how many twelfths ? Sol. — In 1 there are 12 twelfths .*. in ^ there arc 2 thirds of 12 twelfths, or 8 twelfths, that is j%. 2. How many sixths in Jl J 1 J ? ^1 3. Howmany eighths in J? {1 Jl )l IJ^ 4. How many fifteenths in J ? J? 2| I H'i V H^ 3J? !l: ii 60 MENTAL AKITHMBTIC. ^'^l■} ,i 6. How many twenty-firsts inji §1 3|1 29 5 ^ l?t 6. Reduce J, §, |, |, l^^'.j, 2J to twenty-fourths. 7. Reduce J, f , }, 1^, 2J, /g, ly'g, 2^^ to thirty-sixths. 8- Since 4=J|, how may the latter fraction bn d(;rived from the former 1 9. Since 1 1= J how may the latter fraction be obtained from the former 1 10. How many fifths in -j?^ 1 4 1 TO » 1 1. How many ninths in 2 4 ] 14^ 1 g ^ ^5 ^ ^^i 6 1 6 ri 1 r, 9 3g » J 8 <) SO ' 3 6 -? 4 5 • 12 13. 14 15 20 1 18 24 «l 4-1 * TTi ' How many fourteenths in ^f? Reduce to eighths V»g, H k, fl, ?g. Reduce to their lowest terms fi^, /g, J|, ^J, 4f , |f. Reduce to lowest terms jf, J^, f |, '||, f J, ||, yV^. i5 I4» 7 5 4 6 5 « 8 1 lOO» go» 4 8' i?" 16. Reduce to lowest terms §|, | 17. If 2J barrels of flour cost $20, find the cost of 3J biirrels. 18. John has $40 a month, which is J of half of what James has : how much has Jamesi 19. 16 is y^5 of three times some number : fin I | of the number. 20- $4:5 is I of A's money, and B has § as much as A : how much has each 1 21. A h-rse cost $100, which is | of 10 times what the saddle cost : fin I the cost of the saddle. 22. Reduce J, J, |, j'^ to sixteenths. 23- Reduce J, J, y^, ^J to twentieths. 24- Reduce |, |, |, j\, ^:f to twenty-fourths. 25. How, then, may fractions be changed to equal ones having a common denominator ? 26. Reduce J, J, J, y^^, to a common denominator. 27. Reduce I i, *„ §, J (( it it FRACTIONS. — llKUUC'TIOIf, ETC. 61 61 7 * 36 1 4 5 * A: rhat Inal 28. Reduce 4, -j^q, J, n*g to a ccinmon deno ni inalor 29. Reduce I I, I, 5 (( «( « i( (( 4< (( (( i< (i <( M 30. Reduce!, ^, U, | 31. Reduce j2> t?> tu» c 32. Reduce li, 2J, 3f, f 33. Reduce the following mixed numbers to improper fractions : 5/^, 7J^, 12', 10|, 20J, 8|, 7/^. 34 Change the following to mixed numbers 17 _2 5_ _4 8 37 8 3 J 00 4 8 7 5 9 6 13 "4 » 5 ' 3 » ^ » 1 1» 12 » I 5> 30' ? ' an • 35. Reduce to their lowest terms : 23 8 T0> 5' 9 10 2 5 7 2i» T5» 55» T00» 3 2 16 7 8 11 «4' 2?» B0» ??» 1 _4 5 6 7 3 4 3» l80» 5l» TSff* 36. Harry gave his sister $40, which was | of all he had : how much had he 1 37' John being asked his age said : 3 fourths of my present age equals my age five years ago : how old is he 1 38. Find the sum of J-f J-f 2^J_|_J. 39. I gave 8120| for a horse, and $19| for a saddle: find the cost of both. 40. Mary says that J her present age is § of her age three years ago : find her present age. 41. James being asked how much money he had, said : If I had $20 more, | of the sum would be j^^ of what I now have : how much had he 1 42. What is the result of ^ J- ^^ ? j^ j_^7^ t ^-J—^^ 1 43. I owned J| of a ship, and sold g\ of the ship : what part had I left 1 44. John gave f of his money to Charles, ^j of it to Ida, and had 20 cents left : how many cents did John and Ida each receive 1 62 MENTAL ARITHMETIC. Ii'^ ' t Fractions.— Section III. ADDITION AND SUBTRACTION. 4*' Hi Sifl- i.i. Examples. — 21. 1. John had f of a dollar, and his father gave him | more : how much had he then 'i 2. One man had | of an acre of land, a second had |, and a third had J : how much had they all ? 8. Bought a barrel of flour for $7|, and a cord of wood for $42 : how much did he lay out 1 4. 5. Bought 7 E Find the result of /^ + j\- Find the sum of § and J. .616 TO J^T 3 Sol-^=j%, |=,Hj, and j%-\-T%=\hoT\i\, 6. Find the sum of § and | : of J and |. 7. Find the sum of § and | : of | and |. 8. I had f of an acre of land, and bought J of an acre : how much had I then ? 9. Find the sum of 8f +2i-f-3|. 10. Add i, I, f, i. Add ^ and 3§. 11. Find J+ j-f 2j+3iH-74. 12 Add /g, J, j% and J. 18. Find the sum of 2^+3^+81 +12J. 14. J of a number increased by § of the number is equal to 70 : find the number. 15. Willie being asked how much money he had, said : if the amount were increased by | of itself, I should have $84 : how much had hel 16. i of A's money increased by J of his money, equals $81 : how much had hel 17. A man gave $80 for a watch, and $40-|-| of the ti'U - mA, FRACTIONS. — ADDITION AND SUBTRACTION. 63 cost of the watch is 4 times what his chain cost : find its cost. 18. I had 5 of a dollar, and paid § of a dollar for a [)OiiHd of coffee, how much had 1 left t 19. A man owned f of a ship, and sold ^\ of the sliip: what part had he left 1 , 20. Find the difference between J and J, J and g, •J and j\. 21. What is the result of 52+8J~3| 1 22. Subtract ^ from \, J from J, J from {, J from \. 23- Subtract § from J, § from |, J from §, I from ^. 24. Subtract ^ from |, ^ from §, 2J from 3J. 25. Subtract 31 from 4^, 2J from 3J, 3i from 5^. 26. What is the result of J+J ~i ] of A + J- J < 27- What is the result of ^Ve" 1 ^ o*" 5— i^o+i '^ 28- What is the result of 2.^+41—4^1 of IJ-f-li — 2i1 29. What is the result of 3|+2J— 5J? of 2J— IJ 30. What is the result of 4g---4i-f-CJ 1 of 2^+2; 31. What is the result of 1 J+2I| 3J ? of 7§— 5i ? 32. From the sum of w\ and ^^ take I J — :^^^. 33. Findthe valueof"3j+4J--2j--U. 34. A can do a piece of work in 5 days, and li in 4 days : what portion of the work can both together do in oiK^ day ? in 2 days ? in 3 days ? 35- 5 of a [»ost is in tlic ground, and there are 7 feet of it al)Ove ground : find its entire length. 36. The difference between § of my money, and } of it, is ^IGJ : how much have 1 1 if * ! 64 MENTAL AUITUMETIC. 87- Bought a coat for $11 yg, and a vest for $5^, and handed in payment 2 ten dollar bills : bow much change did I receive? 38. From 18 J subtract 7|. ^oZ.-18J-7|=18|-7|=17-hl|-7i =17— 7+i— |=10§=10J. 89. Find the results of 4|— J, of 12—6^9^, of 36j -24|. 40. I bought two articles, one costing $15 J, the othei $20^, and gave in payment a $50 bill : how much change did I receive ? 41. t\ ^^ ^^® candidates at an examination failed ii arithmetic, | in other branches, and 20 passed : ho\i many candidates were there ? / 42- How do you add two or more simple fractions 1 two or more mixed numbers ? 48. How do you find the difference between twc simple fractions ? between two mixed numbers 1 Fractions — Addition, &c. f Ii ' <^- EXAMPLES. — 22. 1. A can do a work in 4 days and B the same work in 5 days : what part of the work can both together do in one day 1 2. John can do a piece of work in 1| dr .uw in 2J days : what part of the work cn^ »">♦ ay 1 8. A grocer sold J dozen of orang. i> oii> an, j of a dozen to another, and | of a dozen to .i third, aad had 3 J dozen left : how many dosen had he at first \ PRAf'TIONS. — ADDITION, ETC. 65 36j >hei ng( I ir twc ork oin not fa 4- Sold I of an acre of land to one man, § to another, and j'j to a third : how mu«:h did I receive at 60 cents an acre 1 6. A can do J of a piece of work in a day, B J and C I : how much can all three do in a day 1 6. If a boy who had $4 J, earned $2| more, and had $lj'g given him, how many dollars had he then ? 7- If a person buy a razor for J of a dollar and a strap for g of a dollar, for how much must he sell them both in order to make half a dollar ] 8. If 6 is I of some number, what is J of 3 times the some number 1 9.8 is J of some number : what is | of the same number? 10. Henry's horse cost 90 dollars, which is -^\^ of 5 times the cost of the cart : required the cost of the cart. 11. A watch cost $90, which is j of 10 times what the chain cost : required the cost of both. 12- What number added to | will make J 1 13- A gave 48 cents, and | of this is 4 times as many as he had remaining : how much had he at first 1 14. Jane having 50 pins, lost i of them and then found as many as remained : how many had she then 1 15. What fraction is that which exceeds ^g by f^ 1 16. What number is that from which if 4i be taken, the remainder will be 3|| ? 17. A beggar met four persons ; from the first he ob- tained J of a dollar, from the second J, from the third I, and from the fourth j*jr : how much did he get from ain 18. Thomas spends 6J- cents for sweets, 12J cents for a top, and 5 J cents for a slate : what did they all cost 1 '♦if-; "• 'I .'I fi6 MENTAL ARITHMETIC. .1' K' 1, t 1 I i, ■ - i. 19- Jamos spent | of a dollar for a book, J of a doUai for half of a ream of paper, and had J of a dollar left ; how much had he at first? 20- A man paid 2J dollars for a hat, 3J for a vest and 9 J for a coat : what did the whole cost ] 21. A man travels 2^ miles the first hour, 3J miles the second, and 4^ the third : how far did he travel in the three hours 1 22. The sum of two numbers is 16 1, and the less is 4 ,3jj : what is the greater 1 23- What number must be added to the sum of 3 J, 2^3^, to make lO/g ? 24. What number is that which added to the sum of i, j'j, and j\ will make §|? 25. A grocer, having a bushel of potatoes, sold J of it to one customer, J to another, and j^g to a third • what part remained unsold 1 26. What number added to ohe sum of 2 J and 3 J will make the result a whole numlier'^ 27. A stage, after making \ and | of its trip, had 7 miles yet to go : how long was itj trip 1 28. From two remnants of cilic), containing resjioc- tively 4f and 8 J yards, were cut 12 1 J yards for a drciss : how much did what was left lack of a yard 1 29. Bought some paper for $12j^j^q, bold it for $13rj'jj : by how much did the cost exceed the profit 1 80. A can do a piece of work in 12 days, and B in 8 days : what part can each do in one day ] How much can both together do in 3 days. Afte ' they have worked 2 days, how much will then remain to be done 1 81. £ can do a certain job in 9 hours, and F in 6 hours. After they have worked together at it one hour and a half, what part of the job remains to be done 1 FRACTIOKS. — ADDITION, ETC. 67 32- A. can do a piece of work in G days, B in 8, an 1 in 12 : how much more work does A do in a day tlian B, and B than 1 33> f of a certain number increased by J of the same number, equals 34 : required tlie number 1 34. A. certain sum of money diminished by its J and ^, equals $15 : required the siim. 35. What number is that which diminished by its |, equals 36 1 36. Find the difference between 9+12f and 8|-f-4i. 37. If j of James's age increased by ^ and J of his age equals 57 years, what is his agel 38- f of B's money increased by the difference between 1 and J of his money equals 190 dollars: required his money. 39- $40 is 4 tines what A paid for a chain, and the cost of the chain, increased by its 11 tenths, is \ of the cost of his watch : required the cost of the watch. Section IV.— Multiplication. Examples. — 23. 1. What is J of J ? ^ol.-{=l and i of l-i;. J of \=l (or ^^J). What is I of i 1 Sol. — f=J5 1 fifth of this is r^^, and 2 fifths i^ 2. Find the result of J of J, J of }, i of i, | of J, J of t%y h of T3- 8. Find the result of J of 2J, If of \l, J of j% J )f 4J 4. I owned f of a ship and sold J of my share : what part of the ship did I sell 1 «!T 68 MEVTAI- ARTTHMKTIC. >i. '. WJ 1- I ''ffl h 1 '■^ 6 7 of 4 1 of $50 is -^^ of the cost of a watch : find its cost*? 6. Find tlie result of § of f of 2;^, of | of 2|. 7. j\ of the candidates at an examination failed in English grammar, | of the remainder failed in geo- gj-aphy, and 10 passed: how many candidates were there 1 8. An orchard has 60 fruit ti-ees, f^ of these are apple trees, and | of the remainder are ])ear trees, and the rest are cherry trees : find the number of each kind. 9. John's age is | of Henry's, and the diffeience of their a^es is 4 years : find the age of each. 10. Find the results of I of y\ of |, of | of V, of | of 11. I paid .f 500 for a building lot, and ,",^ of its price is I of the cost of the house built on it : find the cost of the house. 12. How many is 3 times JJ rj ? J ? 5 ? « ? « ? 13. How many is 7 times ':5 ? -^I J 1 ^'i j'^^-, ? ^^^ 14. Jlow many is 8 times A4 ? times ,-«^ 1 10 times {•;? 15. How many is 1 1 times A 1 _5^ ? 7,, -? J.«^_ ? 1 ^3^] 16. Multiply n,y J. W.— JX3=-0 ; J is the J of 3. '4 X 3 in { of « = 30 4 x6' Ex A Ml' IKS. — 24. 1. If H family cunsuu!'.; ? ot a barrel of flour in 1 week, how much will it consunu; in 6 weeks'? 2. What will cost 6 yarus of cloth, at J of a dollar a yard 1 8. At J of a cent a piece, whjit will 12 oggs cosf? 4. Ha man earns -j of u dollar in a day, how much Vfi\[ he earn in 12 days? MULTIPLICATION. 69 3k, ii* a 6. 6 times 4 and | of 4 are how many 1 6. What will 5 J barrels of flour cost, if a barrel cost 7- 7 times 6 and g of 6 are how many 1 8. If a barrel of flour cost $0, what will 7| barrels cost 1 9. At 6 J cents, what co^t 9 pounds r.f ricel 12 pounds? 151 181 10- If a peck of corn cost j\ of a dollar, how much will 2 bushels costi 11. Find the cost of 20 bushels of wheat, at $2i a ImshcH At $2\1 12- How many are 4 times 2A 1 6 times Sj] 1 13 How many are 8 times oj 1 9 times 5!^ 1 14. If a horse can trot 9^^ miles in 1 hour, how far at ih.it rate can he trot in 8 houisl 15. How much can be earned in a year at $I1;| a m nthi At $U)'l a month? 16 If 8 men can do a piece of work in 3 j days, how loni,' will it take 1 man to do the work 1 17. If g of a bushel of oats is worth S^, what is a bushel worth 1 Aiidh/nis. — If J ,f a bushel of oats is worth $^, g or 1 bushel is worth G tiuies $^, which is $'^ or $J. 18. When J of a barrel of lioui' is worth $1^, what in a l)ai')el worth I 19. If a nu\n can reap -^(^ of an acre in J of a Jay, how much can he rea[) in a day ] 20' It i ot t* melon is worth as niu(;h as Gi aj)ples, how mauy ai)ple8 are worth as uuu-h as 1 m(;lon 1 21. 5,^ is I of wiuit number] Jq of what uuudtri-1 Vn of what number 1 70 MENTAL ARITHMETIC. 22. 5 times 2y'^ is J of what number I 23- 2 times 3| is J of what number 1 24' If 20 pipes of a certain size can fill a cistern in y^^ of an hour, in how long will a single pipe J as large as each of them, fill the same cistern 1 25- Two and 3-fifths, is one-fifth of what number ? 26. One and 3-seventhai^ is one-eighth of what numberl 27* If the current of a river be j^^ of a mile an hour, how far would it carry a boat in 8 hours 1 28. How many are 5 times 3"4,X7 "^ 29. How many are 8 times 12^ — ^1 30. How many are 9 times 10| — 1 1 31. 7 times 20 and | of twenty are how many 1 ' 32. Multiply 4} times 10 by § of 15 ] 33. Multiply 2 times 9 J by 2^ times 4 1 34- Emma is 3J years old, Laura is 5 times as old as Emma. In how many years will Laura be 2H 35. What two ways are there of multiplying a fraction by a whole numberl Division. Examples.— 25. Divide 4 by 2. JSul. — If we divide 4 units of any kind by 2, we get 2 units of the same kind, therefore 4- seven'^hs divided by 2 give 2-sevenths, that IB li V 0. 27ul Sol. — To divide anything by 2 is to take J of it, and J of ;}=-,'*^=^. Divide i by 3, j\ by 4, jj by 5, ^J by C, |f by 7, DIVISION. 71 3. Find the quotients in the following cases : |-7-3, J -^5, l~Q, 2i--4, 3J-T-7, 8i-f-34. 4. Since :}-i-2= |, or j'*^, what are the two ways of tlividing a fraction by an integer] 5. If 100 lbs. of flour cost $4, how much can be bought for $i ? how much for 7 dimes ? for 60 cents? 6. I gave $3| for silk at ^4 a yard : how much did I buy ? 7. Divide 4 by J. Sol. — In 4 there are 20 fifths, and 20 units of any kind divided by 3 of the same kind=2/=6 'j. 8. How many times is ^ contained in 3J? in 4J? in 5| ? in 6 f . 9. Find the quotients in 3-^}, 4-^-|, 5-^J, 4|-j-^. 10- If a yard of cotton costs 'J of a shilling, how much can be bought for 6 shillings ? for 8 ? for 10? 11. If a man can earn | of a dollar in j of a day, iu how many days can he earn $10? 12. Find the quotients in 2j-v-yi3, l?-v-^i„ IV*^-^-^. 13. How much will 10 boxes of herring cost, if 3 j boxes cost $5 J ? 14. 3 men can do a work in 6^ days : how long will it take 12 men to do it ? 16. If 3 J barrels of apples cost $14, how many barrels can be bought for $20 ? 16. If John can v/alk 2 J miles in J of an hour, how far can he walk in 3 hours ? in 5 J hours? 17. A man paid $30 for a piece of linen, at $J per yard : how many yards were there ? 18. How often is j gallon contained in 7 gallons ? ^ week in 8 weeks ? } penny in ddl | of a mile ia 4 miles 1 I of an inch in IJ feet? 72 MENTAL AllITIIMETlC. u:- 1 W III} m m m 11 PI !1 19. If J bushel of potatoes will last a family 6 daya how long will 3 bushels last them 1 20. Divide f by ^. 1«< Sol. — The divisor is fifths ; and the dividend reluced to fifths=Jx5=y fiftjis and y units of any kind, divided by 2 units of the same kind =J of Y' = '^"', which may be got by multi- plying I by |. 2nd aSW.-— | = V^ and |=/(j ; but 15 units of any kind divided by 8 units of the same kind— ^'g^ .-. j (or Ag) divided by ? (or .«o)-= '/ (o»" |X J). 21- How many times is '| contained in | ? | in | ? 8 m J? 1 in 1 I ^ Un^^l ,-\t in 4 i ? g Xli g r g XX. yj. X ,-^ XXX ^ 3 22- How many bags of oats can be bought for | dol- lars, at \ of a dollar a bag % Anahjsis. — As nnmy bags can be bought for -^ dol- lars, as ^ of a dollar is contained times in | dollars ; § is contained in |, Jg^ times=l^ : therefore 1^ bags of oats can be I ought for | dollars. 23 If '<^ mwn can mow J of an acre in an hour, how long will it take liiin to mow g of an acre ? 24. At i of a dollar each, how many knives can be bought for \\ dollars? 25. If a horse can run g of a mile in I minute, how manv minutes would he require to run | of a mile ? 26- If John saves | of a dollar, and James | of a dol- lar in a week, how long, at that rate, would it take them to save 1^ dollars ? 27- How many yards of cloth at $1J a yard can be bought for $2J ? 28. It »^ horse eat | of a peck of oats in a day, how long will 3J pecks last him ? DIVISION. 73 JOW be be lOW 29. A yacht was hired for 10^ dolhirs a day; if each person paid § of a dollar, how many persons were there in the company ? If each were charged | of a dollar, how many then in the company ? 30- In order to raise 6| dollars, how many contribu- tors must there be at /^j of a dollar? at | of a dollar each 1 31. If ft miller takes for toll, /'^ of a bushel of every bushel oi wheat that he grinds, how many bushels must he grind, that he may receive 9| bushels ] 32- If tine cars run | of a mile a minute, how long will it take them to run 25 miles 1 33- If a nian walks | of a mile in | of an hour, how long will it take him to walk 12 miles'? 34. A boy having 12 quarts of berries, sold § of them for$.^ : what was that a quaitl 35. Amongst how many boys can you divide | of I'l oianges, if you give | of ^ of an orange to each ] 36. If a turkey cost ^1|, how many can be bought foi- $1) ? 37. IIow many times will 4 J gallons of oil fdl a lamp tliat hohls J of 5 of 1 gallon ] 38- If a stage run 24| miles in 3 J hours, how far does it run in one hour] 39. F'ought I of 4 J cords of wood for J of 54 dollars, what did it cost a cord } 40. Divide J of i' of 14 by ? of 3 J. 41- A farmer divided 213] acres of land among his tluee sons ; to the first he gave i of it, and the remainder he divided equally between the other two : how many acres did each receive ] 42. A farmer bought g of a farm which was J of what 6 74 MBNTAL ARITHMETIC. his neighbor bought : what part of a farm did his neigh- bor buy 1 48. Divide $42 in dollars, half dollars, and quarter dollars, and of each an equal number 1 44. H(^w many gallons, quarts and pints, and iif each an equal number, are tiiere in 44 gallons t 45" A man met some beggars, giving to the women 20 cents each, the bo}'S 10 cents each, the girls 5 cents each. He gave to all $3.50 : how many beggars were there ? Examples. — 26. 1. What part of 3 is 11 of 3 is 2 1 Sol—1 is J of 3. -.2 is f of 3. 2. What part of 7 is n of 6 is 2 1 of 9 is 7 ? 3. What part of 8 units of any kind is 9 units of tho saniokind'? of 11 is51 of 12 is 4? 4. What part of 5 is 1 1 iSol. — 3=73 and |=,Rt, because 1 twelfth is \ cf 8 twelfths.*. 9 twelfths iu the | o< 8 twelths. 5. What part of | is ^ ? of | is J '{ of J is f ? What of i is A ? I) 19 of J is 1 1 part of ? is I ? 6. What part of 5 i-j J ? of 3J is 3 i of 4| is 6 ? 7. What part of ;<„ is 6 1 of | is 4 1 of | is 3| '♦ 8. What part of a foot is 4 inches 1 3J inches 1 and 9 1 inches 1 9. What part of a mile is 140 rodnl is 160 rods '» 10- What part of an hour is 15 minutes 1 is 40 niin. • 11. What part of 10 miles is | of 8 miles 1 is 2s. Qd. of £2.58. 1 12. A man having $12, gave $2 J for a hat and $3 J i'or a pair of boots : what part of his money did he iim'i g M til h o t; Y n h n ii DIVISION. 75 13. If the interest on $100 is $4, what part of the principal is the interest 1 14. If a man buys a horso for $60, and sells him for $75, what part of his outlay is he gaining 1 15. If a vessel sail 60 miles in 5 hours, what part of 240 miles will she sail in 9 hours 1 16. One man walks 4| miles while another walks d| : what part of the distance that the first walks does the second walk? 17. What part of 3 J acres is J of 4 J acres 1 of 1^ gallons is 1 qt. 1 pt. 1 18. A merchant gained on a hogshead of sugar ^ of 46 1 dollars, which was J of two times what it cost him : whiEkt did it cost him 1 what part of the cost was the gaini 19. John earns 9 cents as often as James earns 12 ; when John has earned 63 cents, how much has James earned ] 20. Two men start from different points and travel towards each other, the first travels 5 miles while the other travels 3 miles, and when they meet the first has travelled 20 miles more than the other : how far apart were they when they started 1 21. ii^ 4 men can do a piece of work in 8 days, how many men can do a piece of work 6 times as great in half of the time 1 22. If 5 horses eat 1^ tons of hay in 1 month, how many tons will six horses eat in 2| months 1 28. How many days will it take 5 men to earn $11|, if 3 men earn $^ in ^ of a day t 24. Keduce 1 year and 4 months to the fraction of a year. 76 MENTAL ARITHMETIC. .^J !l^' T*i;i 25' Reduce 1 year and 8 months to the fraction of a year. 26' Reduce 2 years and 5 months to the fraction of a year. 3 years and 10 months to the fraction of a year. 27. 5 years 9 months to the fraction of a year. 4 yens and 8 months to the fraction of a year 28. Reduce 5 years 7 months to the fraction of a year, 29. Reduce 9 years 11 months to the fraction of a year. 30. Reduce 2 years 4 months 15 days to the frac tion of a year of 360 days. 81. Reduce 4 years 6 months G days to the fraction of a year ? 32. Reduce 5 years 9 months and 18 days to the fraction of a year. 33. What part of a barrel of potatoes at $6| for 2 bai rels, can be bought for $3| 1 34. A carter drew 13| tons of freight, taking 1| ton at a load : how many loads did he draw 1 35. If $100 gain $6 in one year, what part of the principal is the interest ? If the time is a year and 4 months, what part of the principal would be the in- terest 1 36. If $100 stock be bought for $98 in money, what fraction of your outlay are you gaining, if the dividends are 8 per cent 1 37. When mackerel are at $9J a barrel, how much can be bought for $2 J ? 38. If § of 9 were 5, what would J of 18 be I 39. If tho principal is Sl4 and the interest $4, what fraction of the principal represents the interest. m DTVTSTOK. 77 40. If a merchant buys clover seed at $6 a bushel and sells it at $8, what traction is bis gain of his outlay, and what would be his gain on $100 outlay ] 41- If 3 be made 4, what should 100 be made to be in the same ratio ] 42. If a merchant buys tea at 60cts. a pound and sells it at 80cts. a pound, what fraction of his outlay is his gain, and what is his gain on $100 outlay 1 43- If a broker buys $100 stock for $75 cash, the stock yielding 5 per cent., what fraction of his outlay is his gain, and what is his gain on $2000 outlay ] 44 What fraction is | of •?, ? of | is .^j 1 of f is j\ I 45. If I of a certain numler is J of | of | of 8, what is the number 1 Section V.— Analysis. Examples — 27. 1. If 4 bbls. of apples cost $14|, what will -^\ of a bbl. cost] Sol— 4: bbls. cost $^J2-, 1 costs \ of -\2^j.r -^ _8^ costs Y^j of ^^=$1J. 2. What will three bushels of peas cost, if Ig bushels cost $5 1 1 3- When 2 1 bushels of wheat cost $6 J, what will | bushels cost 'i 4. If 5J yds. of silk cost $7§, what will 2 J yds. cost] 5* If I of an orange cost S of a cent, what will '2 oranges cost 1 6. If 2 yds. of satin cost $4|, what will 5 J ytls. cost ? 7. If a man can cut 8 cords of wood in J of a week, how much can he cut in 2^ weeks ? 78 MENTAL AHITHMETIC. \f 1; • m^. jtiS 8. Tf a man can walk 7 miles in 2 hours, how far can he walk in 3 days, by walking 10 hours a day t 0. If 3J- barrels of apples cost $5 J, wkat will J barrel C08t. 1 10. A carpenter worked 11§ days, and after paying his board and other expenses with | of his earnings, had |20 left ; hor much did he receive a day. 11. If 3 mer. incur an expense of $27 1, how much more than ^7 J must each pay. 12. If 3 pair of socka cost $j'q, how many pairs can be bought for $2 y''^'? 13. If 8 men can build a wall in 5f days, in how many days could 5 men do it 1 14. If 9 men can perform a piece of work in 9 J days, how long will 7 men take to do it"? 15. -V is three score years and ton ; if ^ of B's age i^ 4 of O's and I of C's is j^g of A's, how 'Aid is B 1 16. If to J of the number of sheep in a flock you add 70, you will double their number, how many sheep are there in the flock 1 17. Jamea is 18 years old, and J of his age is § of half his brother's age : how old is his brother 1 18. If from a certain number increased by 7 you sub- tract 3, and multiply the remainder by J. of 20, the pro- duct is 80 : what is the number 1 19. If a pole 6 feet long casts a shadow of 6f feet, what will be the length of the shadow a pole of 9 feet will cast? 20- If 6 gold pens cost $7}, what will 7 gold pens ooitl 21* What is the length of a polo, the shadow of which is 10 feet long, at the same time a pole 5 J feet long casts » shallow of 11 feet 1 Willi can ANAT.ySIS. 7d 22- If a ro«n earns $10J in 4 days, how many dollars will he earn in 14 days t 23. If J of 9 be 6, what will a fifth of twenty be ] 24. If J of 10 be 3, what will i of 20 be ? 26. If 8 yards of ribbon coat $1 J, how in^ny yards can be bought for ^3 J 1 26. If 2 apples are worth 1 orange, 2 pears are wortli 3 apples, how many poars are worth 6 oranges 1 ' 27. If i be 9, what will 7 be ] 28. How many yards of cloth f of a yard wide are equal to 12 yards | of a yard wide ] 29. If 840 exceed by $10 J of f of what I gained by the sale of a house and lot, how much did I gain ] 30- If J of a yard of cloth coat $§, what will 3 of a yard cost ^ 31 A man being asked his age, said that were he 3 times as old. j*j of his age would be 8 years . how old was he 1 32. If } of A's age is § of B's, and f of B's age is J of O's, how old are A and B, if C is 81 years old ? Examples. — 2b. ■. 1. 7 is § of what number 1 Sol. — § of some number is 7, 1 third is J, and 3 thirds, or the whole is 3 times J, or ^^^=104. 2- 6 is J of what number 1 3. 25 is I of what number 1 4. 14 is 3 of what number 'i 5. 9 is I of what number 1 6. f of 20 is I of what number 9 7. 13 is I of what number 1 8. 15| is j( of what number 1 ji 80 MENTAL ARITHMETIC. 9- I is I of what number ] 10 f is jAj of what number] 11. I of I is § of what number 1 12: Jamt 3 gave 9 cents for a slate which was | of his money : how UAUch liad he 1 13. A man bought a horse for $90 which was Ij of his money : hovv much had he] 14. A gentleman was married at 'M) years of age which was h of ^^> of his wife's age : how old was the wife 1 15- TvYO men agreed to build a wall, one man built. 15 rods, which was ^ of what the other built : how manv did the secon 1 build, nnd what was the Iciigth of the wall 1 16. A man sold 3i cords of wood at $'My a cord, which was I of what he received for a ton of hay : how much did he receive for the hay] 17. Taid $1 for a neck tie, wViich was ^ of what nij vest cost : what was the cost of the vest ] 18. A son's age is 20 years, and it is f.^ of the father's ase : what is the age of the father ] 19. 1'^ is I of how many times 7 ? Sol. — g of some number is 1.5, 1 -eighth is 3, and 8-eighths is 8 times 3 or 24, 24 is 3^ times 7. 20- 49 is J of how many times 8 ] 21. 3G is :j of how many times C ] 22- ^^^ If* ii t>* l^O'^^ many times 5 ] 23. 28 is 5 of how many times 5 ] 24. s is 7 of how many times 31 26 TO is 5 of how nijtny times ^ ] 31 .' 26. 1^ is V% ^^' '^^^^ many times 2.^ 1 27. *5 of 21 is 3 of wliiit number ] -SW.— ? of 21 is 15, 15 is I of 25 of 25. ^ of 21 is IJ IS ANALYSIS. 81 28. I of 27 is i of what numlipr ] 29- I of 04 is 1 of wliat imnibcr 1 30- 3>| is 4 of liovv many times U- 1 31- I of 36 is I of how many times 5 't 32- I of •'^6 is I of how many times 7 ? 33- I of 48 is I of how many times U? 34- /o ^^ '^■^ ^^ i ^^^ ^^*^^^' "^''"y times ? 35- I of .'iG is I of 3 tim(s wluit numher? Sol--'^ »f 50 is L>4, 24 is f^ of 27, which is 3 times 9 : therefore!) is the reiiuired numher. 36. e of 54 is ^ of i) times wliat niimlter? 37- <7 of 81 is ,"", of 4- times wliat nnmherl 38. i of 36 is ;^ of 10 times what number'? 39. I of 108 is ,^n of 8 times wluit niimhor] 4:0- ^ of I is I of G times wliat number? fS Examples. — 29. 1. A horse cost f^SO, and i of the cost of the horse is ^ of four times the cost of the cari'iage : what was the cost of tlu! cairiaiie ? 2- A watch cost $00 ; and f of the cost of the watch is '^ of G tinies the cost of the chain : tlie ))rice of t!;o chain is re<|nir(Ml. 3. A cow cost .f40, and ^ of this is '^ of 8 times the cost of a sh(!ej) : what is the cost of a sln;ep'? 4. A house is worth ^12,00*), and ;^ of its value is J of 100 times the value of the lot : what is the value of tiia lot? 5. What number added t(> 4 times ' of 21 'vill make 62 ( (J. The insurance of a house amounN'd to !?S0, and ] of that is jj'0 of 3 times its value : wiiat is the value of the house 1 »2 MENTAL ARITHMETIC. \*& . ^ I ' ^ 7. A horse cost $180, and | of the cost of the h>rse is § of 6 times the coat of a cow : what was the cost of a cow 1 8. The distmce from Montreal to Prescott is 112 miles, ^ of this distance is ^\ of 1 6 times the distance to Kingston : what is the distance from Montreal to King- ston, and from Kingston to Prescott 1 9. Kingston is 48 miles east of Belleville, and J of 11 times this distance is § of '^ times the distance between Montreal and Cobonrg : what is the distance from Men. treal to Cobourg 1 10. Port Hope is 33 miles from Whitby, which is A die distance between Napanee and Cobourg, and -fj ol this diistance is J of ;J of the distance from Montreal to Ottawa, and of 60 miles more : what is the distance from Montreal to Ottawa ? 11. A yard of a certain kind of cloth, 4 qnartei-^ « de, is worth $4: what will a yard and a-half of the same kind of cloth, 5 quarters wide, be worth ] 12. I of J of 60, is ^ of how many times f of § of 24 ^ 13- A man had J of his money stolen from him ; the thief was not caught until he had spent | of it, the re- mainder, 50 dollars, was given back : how much monev had he at first 1 14. A farmer dividing his farm between Iws two sohs gave the elder 10 acres more than '4 of the whole, and the younger the remainder, which was 22 acres more than ^ of the whole : how many acres in the farm 1 16. Bought a piano for $240, and 'j of tho cost wa? I of what I received of 8 young ladies for the use of it one year : how much did each young lady pay? 16. A shoemaker's tools are worth $80 ; ^ of this is ANALYSIS. 83 vvde, same of 24^ ; the ;lie re- [() sohs liul the :>iiaii J ^t wa? of it bhis is § of J of 2 times the value of the stock : what is the value of the stock 1 17. A farmer, after selling $200 worth of Ids stock, finds that f of the remainder is equal to | of three times the amount sold ! what was the value of his stock at first? 18. Two boys comparing their money — one said he had 60 cents, the other said, j'^ of your money is just -j^Tj of 6 times my money : how many cents liad the latter ? 19. A boy being asked his age, said that 18 years was 2 years less than | times | of his age : how old was he'? 20. A man pays $600, and | of this is just § of J o^ twice his annual income : what is his annual income] 21. A gentleman is 64 years old, which is 2§ times the age of his eldest son, and the eldest son is 2"^ times as old as his youngest brothei- : whit is the ditleronce in the ages of the two brothers ? 22- A and B engaged in play ; A lunl § as much money as B, B gaining $16, which was | of 1^ times as much as he commenced with : how much did he com- mence with, and how much had he loft ? 23. A farmer gave § of 1 1 times his ready money for a buggy, I of what was left for a harness, and had re* maining $12 : what did he pay for the buggy ? 24- A does a piece of work in 4 days, and B in 5 days : in what time could both together do the work ? Ans. — A in 1 day docs J, and B ^/.both do ^'o in 1 day, :v'j} in ^ day .'.the wholp in ''j/^r:::r2| days. 25 One tap (ills a cistern in 3 hours, another in 5 hours: in what time would both running together liSl it? 26. A does i( of a v^^ork in 4 days> when B comes to help him, and they finish it in J days: how long would each bv hintself take to do the work ? 84 MENTAL ARTTHMETTC. I ) 27. If A can do a pioce of work in 6 days, and B ^ as miicli again as A in a day, how long would B take to comj)lot() tlie work after A liad worked 1^ days ? 28- ^ t;«H a piece of work in 6 hoiirn, and li in 8 hours : how long would B take to finish the woik after A hfid worked 3 hours ? 29- A do(?s ^ of a piece of work in 16 days, h(! then calls in B, and they do the work in 4 days more : how long would B take to do the work 1 30- A does a jaeceof work in 3 hours, which is twice the time B and C together take to do it, and A and (J could do the work in 1^ hours : how long would B alone take to do if? 31. A, B and C can dig a ditch in 20 days, A and B in 40 days, and A and C in 30 days : how long would each take to do it 'i 32- One »hoeui8,ker makes a pair of boots in § of a day, another in | of a day : how many paii- can both make in a 3.>\y 1 33- A, B and C can do a piece of work in T) days, B and C can do it in 8 days ; in what time can A do it alone t 34. A and B can do a jHece of work in 30 days, B in 70 days : how much more of the wo» k does A do than B 1 35- If ^^ "it^n can do u work in 10 days, how many m«n could do 4 times as much in one-fifth of the time? 36. If a banel of flour suj)ply 4 persons T) weeks, how much v'ill su|)ply 3 persors 'ij weeks ? 37' ^f 3 furnaces consume 1 2^ tons of coal in 2o days, how long will 8^ tons last 5 furnaces? 38- A and I? can do a piece of work in 1 !j days, A and ANALYSIS. 85 of a both s, B ulo it lA ao Lany lime '? how C in IJ clays, and B and C in 2| day« : in what time could B alone do it 1 39- A can do a piece of work in 3 dayx, B in 4, and C in 6. A leaves off h a day befoio the work is finished, and B | of a day, C finishes the work : how many days did A, Band C work? 40- A crew can row down a stream a certain distance in 30 minutes and back again in 32, what fraction of the distance is the rate of tlio stream an h ur ^ H the rate of the stream be half a mile an hour, wnat will the dis- tance be 1 41. A crew rowed down stream 7 miles iii 30 minutes and up stream the same disffv^oein 35 minutes : find the rate of the stream per hour. 42- A crew can row down a stream in 20 minutes and back again in 30 : find the distance, the rate of the stream being IJ miles an hour. CHAPTER Til. REDUCTION AND COMPOUND RULES. Section i.—Currency. EXAMPLKS.— 30. , ' 1. How many farthings in 1 half penny ? in 2 pence ? in 3 pence 'J in i)(;nct>'? in 5^ pence I in 7^ pence I 2. How nuiny \)ence in 5 cents 1 in 101 in 20 1 in 25 1 3. How manv f) Cf nt pieces make a dollar ] how many K) "J how many 201 4. How many cents in 3 pence? in 6d? in 9 j)enee1 in 12 pence I iu 30 pence? in GO? in 15 pence? 86 MENTAL AHITHMETIC. 5. How many farthings in 8 pence ] in 12 Bought 20 yards of cloth at one-half dollar a yard : liow many dollars di >> Hiotographic Sciences Corporation 23 WIST MAIN STRUT WHSTIR.N.Y. I4SS0 (7)6) •7a-4S03 V iV ^^ i\ \ rv ^->.^* Vv"Q 92 MENTAL ARITHMETIC. ells can be made from a piece of cloth containing 18 French ells 1 ■ 6. How many nails in three yds. 3 qrs. 3 nails ] in 75 nails, how many yd«. &c. 1 7. How many dresses each containing 10 yds. can be made from a piece of cloth containing 40 ells, English 1 8. A coat requires 3 yds. of cloth : how many coats can be cut from 40 Flemish ells 1 9. tn 7 yds. 2 qrs., hovr many E. B. 1 how many E. Fr. % how many E. Fl. i 10. Tf 5 yards of cloth cost 7 dollars, how many yards can be bought for 56 dollars 1 u m Square Measure Examples. — 38. 1. A black-board is 4 feet wide and 12 feet long : how many square feet of fu-'face has the board 1 2. A slate has a surface of 80 sq. in., it is 8 in. wide : find its length. 8. How many sq in. m one sixth of a sq. ft. 1 in 3-sixths1 in 5- sixths) 4* How many square inches in a board 4 inches long and one inch wide 1 in 4 inches long and 2 in. wide 1 in 4 inches long and 3 inches widel • 5. A board is 3 yds. long and ono yard wide : how many square yards in it 1 6. How many square feet in 3 square yards 1 in 8 square yards i 7. A yard of carpet is 3 ft. long and 3 ft. wide : how many square feet in it 1 CUBIC MEASURE. 93 coats 8. How many square feet in a yard of cloth 2 feet wide ? in 5 ft. wide 1 9- How many square feet in a room 12 ft. by 15 ft. 1 how many sq. rods in 1 ac. 20 rd. or land 1 10. How many yards of caipefc 2 ft. wide will bo re- quited to cover the floor ot tho above room 1 Cubic Measure* m long in how in 8 how Examples. - 39. 1. How maiiV cubic feet in one ninth of a cubic vard ? in 4-ninths ? in 7-ninths 'i 2. How many cubic feet in 3 cubic yardi? 9 cubic feet? 3. A brick is 2 by 4 by 8 inches • find its solidity ? 4. How many cubic feet in i cubic yard i in 3 oubic yards ? in 4 cubic yards 'I 6- How many cubic yards in 27 cubic feet? in 81 cubic feet? in 100 cubic feet'f 6. How many cubic feet in 2 tons of timber 'i in 5 tons? 7. How many cords in 32 cord feet? in 24 cord feet? in 80 cord feet ? 8* How many cords in a pile of wood 24 het long. 4 feet wide, and 4 feet high ? 9. How many loads of earth, each 1 cubic yard, must be removed in digging a cellar 21 feet long, 18 feet wide, and 6 feet deep ? 10. How many cubic feet are in a stick of timber 16 inches wide, 9 inches thick, and 21 feet long 1 94 MENTAL ARITHMETIO. Liquid Measure Examples. — 40. 1. How many gills in 4 pints? in 8 pints? in 12 pints? in 11 pints, 2 gills? in 13 pints 3 gills? 2. How many pints in 16 gills? in 32 gills? in 36 gills? in 47 gills? 8- How many quaHs in 3 gallons ? in 8 gallons ? in 15 gallons? in 10 gallons .^ quarts] in 13 gallons 2 quarts 1 4. How many gallons in a pipe ? in 1 hogshead ? in 1 tun ? in 4 barrels ? in 6 barrels ? 6. If a tumbler hold half a pint, how many times will 1 gallon of water fill it ? 6 Thought 5 gallons of oil for $10, what is the price per quart ? 7. Bought a pint of milk for 4 cents, at what rate is that per gallon ? 8. 3 pints of molasses having been sold out of 2 gal- lons, what is the remainder worth at 80 cents a gallon ? 9. A merchaQt bought a hogshead of molasses for $40 and sold it at the rate of 30 cents for 6 pints, how much did he gain by the bargain ? 10. How many pint bottles will be required to hold 4 gal. 2 qts. of tomato catsup ? Drr Measure Examples. — 41, 1. How many pints in 2 quarts? in 5 quarts? in 7 quarts ? In 8 qts. 1 pt. ? in 9 qts. 1 pt. ? 2- How many quarts in 1 peck ? in 2 pecks ? in 5 pecks 1 in 4 pks. 3 qts. ? in 5 pks. 2 qts. ? TIME TABLE. 95 in 7 in 5 8- How many pints in 1 peck 1 in 3 pecks'? in 7 pocks 1 in 2 pks. 1 gal. 2 qts. ? 4. How many pints in 3 bushels, 3 pkSo 3 qts. 1 6. If a chaldron of coal costs ^12, what is the price per bushel '? 6. How many baskets, holding 2J pecks each; will 5 bushels of apples fill ? 7. If a horse is fed 6 quarts of oats a day., how long will it take him to consume 6 bushels 1 8. If 8 pints of strawberries cost 32 oents, what will 1 bushel cost at the same rate ? 9. A sold to B 1 bushel and 1 peck of currantSj at 2 cents a pint, and received in payment 1 bushel of rasp- berries at 4 cents a pint : who pays the difference, and how much ? 10. A farmer sold 2 bushels 3 pecks of clover soed at $6 a bushel, receiving in payment 5 bushels 2 pecks of wheat at $1.50 : what is yet due him 1 11. A boy gathered 3 bushels 4 quarts of chestnur« : how many times would they till a pint measure 1 TIME TABLE- EXAMPLES. —42. 1. How many seconds in 2minute8l in 4 minutes? 2. How many minutes in 2 hours 1 in 4 hours 'i in 1 20 seconds 1 8. How many hours in 2 days? in 4 days? in 360 minutes 1 in 3,600 seconds ? 4. How many days from 1st January to the 17th of March 1 from 3rd February to Ist July? 5' How many months from August 9th to November J I \m I til i Hi ihm mi lis I ii ■ »r !, ,. ^ii ■ y.t:; 96 MENTAL ARITHMETIC. 9th t from June 2iivl to November 2nd 1 from April 6th to October 6th 1 6. Which years are lea]) ywirs? Wliicli of the months have 31 Jays? How many clays has 5th month] the 11th month 1 7. What are the natural divisions of time 1 how are the year and day divided 1 8- If a man can do a piece f w )rk in 30 minutes, how many hours would it take him to do 15 times as much 1 9. A can d>> a piece of work in 20 minutes: how many hours would it take him to ks at 10 cts. each ] 4. How many score in 60 1 in 80 1 in 100 ] 6. What cost a ream of paper at 10 cents a quire 1 1 gross of pens at 5 cents a dozc^n 1 COMBOUND RULES. 97 111 6th lonths ] the )w are s, how nnich ] many Slid of much (penses ijive in in tes, inutes, lents a each ] ] I 6- At $11 a hundred-weight, what costs 1 barrel .f beef 1 3 barrels of beef 1 7. Bouglit a barrel of pork at 12 cents a pound, an* sold it at $15 a cwt.: how much was made by the salel 8. Bought wheat at 3 cents a pound, and sol I it at $2 a bushel : how much was made on a bushel 1 9. Paid 6 cents a pound for flour : how much was that a barrel 1 10> Bought 170 lbs. of oats : what was the cost at 62 cents a bushel 1 11. Bought 300 lbs. of wheat at 2 cents a pound, and sold it at $1.50 a bushel : how much lid I gaini Compound Rules. Examples. — 44. 1. Add 7 bushels 2 pks. and 8 bushels 3 pks t 2- A grocer sold on Monday 5 gals. 2 qts. of m lasses ; on Tuesday, 2 gals. 2 qts., and on Wednesday 4 gals. 3 qts. : how much did he sell in the three lays 1 8. How many acres are there in two fields, one con- t lining 9 acs. 70 rds., the other 8 acs. 9i rds. 1 4. A fore quarter of lamb weighed 7 lbs. 9 oz., and a hind quarter 8 ios. 12 oz. : how much did both quarters weigh 1 6. Find the sum of 3 yds. 2 ft. 9 in., and 4 yds. 2 ft. 6 inches. 6. A farmer sowed 1 bushel 4 qts. of clover-seed, and 1 bushel 2 pks. 3 qts. of timothy-seed : how much did he sow of both kinds ? 7. Ad! together 50 cubic yds. 13 cubic ft. an.'' 10 cubic yds. 17 cubic ft. 1 98 MENTAL ARITHMETIC. 8. A coal dealer delivered 12 tons 10 cwt. of coal to one man, and 8 tons 15 cwt. to another : find the whole quantity sold to these two men. 9- A man had 9 bushels 3 pks. of potatoes, he sold 5 bushels 2 pks.: what quantity had he left? 10« A grocer had 1 3 lbs. 8 oz. of castile soap, he sokl 8 lbs. 10 oz. : how much Lad he left? 11. From 16 ft. 5 in. take 11 feet 7 inches? 12. From a cask containing 16 gals. 2 qts. of vinegar, 10 gals. 3 qts. were drawn : how much was left ? 13. I have 9 weeks vacation and 6 weeks 4 davs have already passed : how much of it is left ? 14- A crock with the butter in it weighs 34 lbs. 8 oz., the crock alone weighs 7 lbs. 12 oz. : how much butter does it hold ? 16. From a piece of land containing 7 acres, 3 acres 70 sq. rods were sol I : how much is left? 16- It takes one hour 45 minutes to go by rail from Toronto to Hamilton, and 3 hours and 20 minutes to go by b at : how much time do I save by rail ? 't'., EXAMPL/S. — 45. 1. How much tea will it take to fill 6 canisters, each containing 1 lb. 8 oz. 2. If a horse eats 2 pks. 6 qts. of oats in 2 days, how much will lafit him 14 days? 3. Multii)ly 3 qts. 1 pk. by 10. 4. It takes 7 yds. 3 qrs. of cloth to make one suit of clothes : how much will be i-equired for 5 suits ? 5. If S cows eat 3 tons 18 cwt. of hay during the winter, how much would keep 6 cows ? oal to whole sold 5 le soUl ncgjir, -^s have 1. 8 07.., butter I acres lil from to go I, each J, how I VI I I or t of the COMPOUlfD RULES. ^ 6- If it requires 2 bushels 1 pk. 2 qt«. of wheat to sow an acre of land, how much will be required for 5 acres t 7. Jenni. is 9 years 7 months ohl, and her mother is 4 times as old : find her mother's age "? 8. If a family use 8 dozen 9 eggs in 2 weeks, how many dozen would they use in 8 weeks 1 9. Find the weight of 6 cubic feet of granite, when 1 foot Aveights 1 cwt. 1 qr. 15 lbs. 1 10- Multii)ly 2 gals. 1 qt. 1 pt. by 7. 11. If 1 1 bushels 3 pks. of grain sow 5 acres, how much is required for 1 acre 1 12- Divide 21 miles 40 rds. by 4. 13- I^ a cooper can make 4 barrels in 5 hours, how 1 ng will it take him to make 3 barrels 1 14. Four bags weigh together 8 cwls. 2 qrs. 10 lbs : what is the average weight of each bag 1 15. Divide 35 years 6 m nths byfi. 16. If one barrel h Ids ^ bushels 3 pks. of apples, how many barrels will be required to h Jd 5 bushels 2 pecks 1 17- I divided 12**. 6d. among a number of boys, giving each 2s. Qd. how many boys were there 1 18. A stationer sold 21 gross 7 dozen of copy books in ^' days : find the average daily sales. 19. A farmer cut 15 tons 5 cwt of hay from 5 acres : what, was the average per acre] Examples. — 46. 1. What is the sum of 10s. 9d. and 3s. 6d. 2. What is the sum of £1 3s. 9d. and £5 9s. 4d.1 8. A boy throws 3 pks. 6 qts. of potatoes into a barrel iMm 100 MEN TAL ARITHMETIC. already containing 2 pks. 3 qts., how many bushels, &c., are then in the barrel 1 4- A grocer mixes three kinds of tea ; 5 lbs. 11 oz. of the first kind, 6 lbs. 7 oz. of the second, and 3 lbs. 10 oz. of the third : how many pounds in the mixture] 5. From a bin containing 10 bush. 3 pks. 1 qt. of oats, a person took 3 bush. 9 pks. 6 qts., how much was left] 6. How much of my fence remains to be built, if there is 15 rods 5 yds. to be built in all, and 11 rods 2 yds. 1 ft. is completed ] 7. What are the contents of 8 pitchers, if each hold 1 qt. 1 pt. 1 gim 8- If 1 nian can do a piece of work in 4 hours 45 min., how long will it take 6 such men to do itl 9. How many quart boxes will 2 pke. 6 qts. of bellies fiin 10. How much must I pay for a I'iece of rand 10 rols by 12, at the rate of $160 an acre ? 11. A school walk containing 240 sq. ft. is 12 ft. wide, what is the length 1 12. How long must a box be that is 4 ft. wide and 3 ft. deep to contain 1 8 cubic feet 1 13- What will 3 gross and 6 buttons cost at 10 cents a dozen] 14- At 40 cents a square foot, what will be the cost of a piece of land 30 ft. by 50 ft.] 16- A boy observes that the fore wheel ot his little wagon makes 55 revolutions more than the hind wheel ill goinij 20 rods : what is the circumference of the ^e wheel, that of the hind one being 3 feet ] 16. The difference between the product of two num- bers and 9 is 171. One of the numbera is 12, what is the other ] COMPOUND l{L LKS. 101 17. A room 16 ft. long by 12 ft. wide costs $30 to carpet it : what would it cost to carpet a rorm witli the same carpet if it were one yard less in length, and 2 feet less in Mridth 1 18. How many days of 6 hours each will it take 15 men to do a piece of work, if 5 men can do it in 9 days of 10 hours eachi 19- How far will a locomotive, moving at the rate of 6 miles in 15 minutes, go in an hour and a half? 20. At 3 cents an inch, how much will 2 yards, 2 feet, 2 inches of silver wire cost ? •51. How many bricks 9 inches by 4 will bo required for the bottom of an oven 8 ft. by 6 ft. *? 22- The divisor and quotient are the same, the re- mainder is 7 inches, which is tw • less than the divisor : what is the dividend ? 28. A room 12 feet wide costs $30 to carpet it, but if it had been 3 feet less in length it would only have cost $24. Find the length of the room. 24. A owes B $25.20, and gives him on account $17.75. If he pays the balance with a ten-dollar bill, how much change should ^i j receive 1 26- Divide 20 bush. 7 pks. 3 qts. of potatoes into 10 equal heaps : how much have we in each heap 1 26. At $2 a square rod, a man paid $960 for a build- ing lot : how much land did the lot contain 1 27' From a pile of wood containing 7 cords, a man sold 4 loads, each 12 feet long, 4 feet wide, and 4 feet high : find how much remained. 28- When peas are worth $1.60 a bushel, what will 6 quarts cbst ? 29. Find the cost of 12 lbs. 16 oz. of ham, at 16 cents a pound. 102 MENTAL ARITHMETIC. ing 80. It costs $20 to carpet a bedrocm with carpet cost a square yanl ; the room is 12 feet wide: how long is it 1 31- Find the cost 'f fencing, at .f 3 a r^d, a field which is 60 rods long and 40 rods wide. 82- How much clover seed will be required to sow a field of 8 acres, one acre requiring 1 peck, 5 qts 1 88' A stationor paid $3 a ream for paper, and sold it at 27 cents a quire : find his gain on 5 reams. 84. A market woman took 6 dozen of eggs to mar- ket, broke 9 of them, and sold the remainder at 28 cents a dozen : how much did she receive? 85. What is the value of a load of oats weighing 1037 lbs. at 40 cents a bushel 1 86. Find the thickness of a block of stone containing 360 cubic feet, its length being 30 feet, and its width 4 feet. 87- A floor is 21 feet long and 6 yards wide : what will be the cost of painting it, at 30 cents a square yard 1 88. What will be the cost of 17 cwt. 3 qi-s. 10 lbs. of iron, at $60 per ton 1 89* How many bushels of wheat are there in a load of 32 bags, each bag containing 92 pounds 1 40. How many pint ai^d quart bottles, of each an equal number, can be filled from 19 gals. 3 qts. 1 pt. of cur rant wine] iJUESTIONS FOR EXAMINATIONS, lOS CHAPTEK IV. )S. of load iqual rant Questions for Examinations. (1) 1. John had 26 marbles, he >^ » by 128, take the square root, and multiply by 50 : what is the result? 12- A can do a piece of work in 4 days, and B in 4 J days : in what time will both working together do § of the work? 13. I of 56 is f of how many times 16 ] (2.) 1. I bought a horse for $175, kept him 7 weeks at a cost of $35, and sold him for $275 : how much profit had I? 2. The dividend is 285, the quotient 17, and the re- mainder 1 3 : find the divisor. 8. Bought 10 reams of paper at 20 cents a quire, and sold it for $4.50 : what was my gain on each quire ? 4- I divided .£1 7s. 6d. among a number of children, giving Is. 3d. to each : how many were there 1 6. Div'ide $75 between A and B, giving B $15 more than A. 6. -,-\ of the candidates at an entrance examination failed in English grammar, j^^ of the remainder failed in arithmetic, and 15 passed : how many candidates were there 1 7. The distance from Yarmouth to Boston is 240 miles, and twice the distance from Yarmouth to St. John is 30 miles less than J of the distance from Yarmouth to Boston : find the distance from Yarmouth to St. John. 8. A man working 9J houi-s a day can do a piece of work in 8 days : how many days will it take him if he works only 6 J hours a day 1 9> A and B can do a work together in 2J days, A can do 3 times as much in a given time as B: find the time each would take to do it. QUESTIONS FOR EXAMINATIONS. 105 niles, is 30 ~i to n. of : he can lime 10- A boy spent | of his money, and then found that was j^2 of what he had remaining : how much had he at first 1 11. It costs $72 to carpet a room 24 feet long and 18 feet wide : what would it cost if the room were a yard wider 1 12- If to my age you add | of it and 15 years, thd sum will be 39 years : find my age. (3.) 1. A farmer sold a horse for $132, and a cow for ^G8 : how much had he left after i)aying $85 for a waggon 1 2- $450 is divided between Harry and James ; as often as the former gets $8 the latter gets $7 : how much does each receive ? 3. When $400 is paid for 25 acres of land, what will . 1 acre and 1 rood cost 1 4. A market woman sold 4 lbs. 4 oz. of butter, at 32 cents a pound, and took her pay in cotton at 8J cents a yard : how many yards did she have 1 6. Find the least number from which 17, 34, and 51 can be subtracted an exact number of times. 6. A man after paying an income tax of 2J cents in the dollar, had $1,5G0 left : find his income for a yearl 7. A can do j\ of a piece of work in 9 hours, and B in 15 hours ; after A has worked 3 hours B comes to work : in what time will the work be finished ? 8. A boy being asked how much money he had, re- plied : if you add 1 to 6 times what I have, 13 times the square root of the sum will be 117: how much had h<: 1 9. How many yards of carpet 27 inches wide will it take to carpet a floor 18ft. 9in. long and 12ft. wide 1 106 MENTAL ARITHMETIC. 1^' if ■ 11 u, I t 9 ftKS» - jk 10. A man failing in business was able to pay only t of his debts ; a certain creditor received $940 : what was the amount of his creditor's full claim 'i 11. In a High School | of the scholars study Latin, I of the remainder study Goi'man, and the rest trigonome- try, and there are 5 more in trigonometry than in German : find the number of scholars in the school ? 12- A father and his son earned $75 in one month ; the father earned l^ times what the son earned : iind what each earned v)er month. A. 1. A man bought a house-lot 10 rods square for $400, and sold it for $41 a square rod : how much did he gain or lose 'i 2. A boy bought a number of oranges for $2.75, and sold them for 7 cents each : how many did he tuy"? 8. The area of a room is 20 J square yards ; its length being 15ft. Gin. : find its breadth. 4. A man invests ^ of his fortune in land, ^ in bank stock, ^ in business, and has $3,375 left : find the amount of his fortune. 5- What number must be added to 355 to get a sum exactly divisible by 171 6. I of my present age is | of my age 10 years ago : find my present age. 7. Bought 12 yards of tweed at $2.75 a yard, 16 yds. of silk at $2.12 a yard, and 50 yards of cotton at I Ah cents a vard : find the amount of the bill. 8. Of all the numbers (besides unity) which may be subirycted an exact number of times from 255, which be taken the greatest and which the least number of times 1 QUESTIONS FOR EXAMINATIONS. 107 9- Square 15, subtract 25, divide by 50, multiply by 225, take the square root, add 34, take the square root, and multiply by 250 : what is the result ? 10- J of 7 is I of how many times 31 11. A garrison in a state of sies'e is put on short allowance : each man receives 12 oz. of bread, which is ^ of a full ration, and 10 oz. of meat, which is | of a full ration : find th^ daily rations. 12. A horse cost $1,200 and | of its value is i of 2 J times the value of the farm on which it stands: find the value of the farm. (5.) 1. A man bought a pig for ^1 15s., a sheep for 158. more than he gave for the [n^j;, and a cow for twice as much as he paid for the sheep and pig : how much change did he receive out of a £20 note 1 2- If a man take 3 steps in going 10 feet, how many would he take in going a mile 1 3 Find the L. C M. of 3, 17, 51, 102? 4. Charlie and Willie had each the same number of cents; Charlie spent 10 cents, and then they together had 70 cents : how many had each at first 1 5. If A can do a work in 3 days, B in 4 days and C in 5 days, in what time could all working together do the work 1 6. A has a certain amount of money, and B lias 1 J times as much, both have $180 : how much has each 1 7. A man owns J of a ship and sells J of his share for $1,275 : find the value of the ship. 8. The length of a room is 18 feet 6 inches, and its breadth is 12 feet : how many yards of carpet 27 inches wide will cover the floor 1 0U 108 MENTAL ARITHMETIC. W. 1 iff- r >« f ■ iM"., *' ■ -"If -, m 9- J of 40 is j®2 of how many times 10 J ? 10. A boy being asked how many cents he had, said 4 times the number is 18 less than 7 times the number how many had he 1 11. If 3 pints contain 114 cubic inches, how much will bo contained by a rectangular boiler 2 feet 6 inches long, 1 foot 7 inches wide, and 18 inches deep *? 12. If § of a yard of cloth cost 80 cents, what will j of a yard cost 1 13- 7 men can build a wall in 8 days of 10 hours each : in how many days of 12 hours each could they do it 1 (6.) 1. Find the result of 75+85— 27-f- 12. 2. A man undertook to split 400 ratls at the rate of 1 rail in 3 minutes, agreeing to pay 5 cents for every rail he was short of the 400, he worked 10 hours and gave up : how much had he to pay 1 8- A buy being asked his age replied : if you add 5 to my age, take the square root, multiply by 5, add 5, and take the square root, the result will be 5 : how old wap hel 4. A man bought some apples for 88 cents, at the rate of 5 for 11 cents, and divided them among his 5 children : how many did each receive 1 6. A and B can together do a piece of work in 25 days, B can do 2J times as much as A in a given time : find the time required by each alone to do the work 1 6. If G persons spend $36 in 3 days, how much will 10 persons spend in 6 days 1 7. A farmer sold 12 sheep which was f of } of his flock : how many were in the flock after the sale 1 I th m m be th cli 1^ th QUESTIONS FOR EXAMINATIONS. lOd |e rate Iren : lays, find II 10 his 8- $500 is to be divided between A and B so that as often as A gets a dollar, B gets § of a dollar : what will each receive 1 9. A quantity of sugar was sold for 12 cents per pound, the gain being ^ of the cost price, the total gain was $3 60 : find the quantity of sugar. 10. I^ one-third of a shilling were Qd., what would | of £1 hiil 11. J of 64 is I of how many times | of 32 ? 12. A flag-staff 80 feet high was broken into two parts by the wind, it was found that ^| of the longer part was i\ ^^ ^h times the shorter part : find the length of each part. 18. I of 72 is I of how many times j\ of 601 (7.) 1. A man bought two building lots, one for $246 and the other for $328, and sold the two for $1100: how much did he gain 1 2. If a machine can cut 100 rails in a minute, how many can it cut in 10 days of 10 hours each 1 8- A teacher having a school of 100 boys and 120 girls, divided the scholars into the largest possible num- ber of classes so that each class of girls should number the same as each class of boys : find the number of classes. 4. Bought a gold chain 18 carats fine, weighing 2oz. 14dwt. 10 grains, at $24 an ounce : find the cost. 5. I of 27 is I of how many times y'^ of 90 1 *6. A.t what hour between 3 o'clock and 4 o'clock will the hour and the minute hands of a clock be together 1 * Se A stationer sold a dozen articles for a certain price ; J his gain on 5 articles was his selling price for 3, and he sold 4 for 40 cents : fin.l the whole cost. 4. Two men bought a quantity of flour for $40, the first paying $3 for every $2 paid by the second ; the flour was $6 a barrel : how much will each have ] 5. "Hj *f the population of Dartmouth is | that of Yarmouth, and the population of Yarmouth is 2,400 greater t?ian that of Dartmouth : find the population of each. 6. Divide $144 among A, B, C, giving A $2 as often as B gets $3, and C $4. 7. Kggs ai"^ sold at the rate of 35 for 54 cents, and the gain at this rate is one fifth of the cost : find at what rate ; er dozen they were purchase^l. 8. If an army marches 130 miles in 6 J days of 9 hours each, how far can it march in 4 J ^lays of 10 h )urs each 1 9. If a horse eats | of a bushel .;f oats per day, how loner will 5| bushels last him ? 10. In a certain business a partner whose share is j*jj of the capital, receives $900 of the profits : what share is owned by a partner who receives $800 of the profits 1 11. Lead weighs 11| times anl platinum 21 times an equal bulk of wal;er : find the weight of a piece of platinum equal to a piece of lead weighing 190 lbs, (12.) 1. The population of Newcastle, N.B., is 2,125, and of Moncton, 2,275 ; find the population of St. John, which would make nine Newcastles and as many Moncfcons. 2. Find at $4 a cord, the value of a pile of wood 76 feet long, and 6 feet high. QUESTIONS FOR EXAMINATIONS 115 IS A ire is 1 ?s an inum id of ihich 76 3' The expense of carpeting a room was $G0 ; if the breadth had been 2 feet greater, the expense would have been $70: fin 1 the breadth of the room. 4- Charles having been asked his age replied ; 5 times my age is greater, by 24 years, than three times my age : fi'id his age. 6. The population of Woodstock (N. B.), is 2,500 and I, of this is I of 2 J times the population of Fredericton : find the popuJati(A of this city 6. The population of Toronto is 6| times that of Charlottetown, anl | of the population of Charlottetown is greater by 1,000 than ^ of that of Toronto : find the population of each of these cities. 7. If A and B can do a work in 3 days, B and C in 4 days, and C and A in 6 days, in wliat time could each by himself do it 8. A grocer mixed a quantity of sugar worth 8 cents a Qpund with an equal quantity worth 10 cents a pound, and sold the whole at 11 cents a pound, gaining on the whole $10 : find the quantity of each kind. 9. If a room is 12 feet wide and 15 feet long, what must be its height that the area of the walls may amount to 72 square yards? 10- Find in dollars and cents the cost of a piece of English cotton containing 72 yards, at 5^d. a yard — the shilling sterling being worth 24 J cents 11. B can work twice as fast as A, they both can in 5 days do a work for which $20 is to be paid ; they work together 3 days and then B leaves, and A finishes the work : how should the money be divided ) 116 MENTAL ARITHMETIC. (13) 1. What portion of 3 cwt. 14fi)s. is J of 1 cwt. 2 qrs. 7!b.s? 2. The longitude of Halifax is 65° 4', and that of Montreal 73° 37' : find the difference in time between these two cities, 15° making a difference of one hour. 3- What number increased by 3, multiplied by 4, 3 subtracted, and the remainder divided by 11, gives quotient three 1 4. If John had as many more marbles as James, and half as many more, and 8 besides, he would have 63 : how many has James H 5. A boy agreed to carry 100 glasses on the conditions that for every glass he carried without breaking, he should receive 10 cents, and pay 30 cents for every one he broke ; he received $6 : how many did he break ] 6. A boy found a sum of money, and on giving it to the owner he received as a reward ^ of the sum ; had he received J of J of the sum his reward would have been 25 cents more than it was : how much did he receive 1» 7. A merchant sold some cloth at 87 J cents a yard, gaining $6 ; had he sold it at $1 a yard he would have gained $9 : how many yards did he sell 1 8. What sum of money increased by | of itself, and then by § of | of this sum, gives $45 ? 9- The distance from Halifax to Shubenacadie is 40 miles. A starts to walk from the former place to the latter, and B from the latter to the foinier ; when they meet, j\ of the distance walked by A is found to be equal to J of that travelled by B : how far had each walked ? lO. Sold two horees at $200 each, on one of them gaining J of what he c st, on the other losing J of what be cost : find the net gain or loss. QUESTIONS FOR EXAMINATIONS. 117 qrs. have f, and is 40 |o the they lequal bdl them Iwhat 11. C apples and 4 oranges cost 18 cents ; 3 apples and G oranges cost 21 cents : tind the ci)8t of one of each. (14. 1. The longitude of St, John is 60° and of Toronto 79° 25' : find the difference between St. John time and Toronto time. 2. A farmer wishes to bnild a board fence 270 ft. long ; he has boards 13 J, 18 and 22 J feet long resp, : what k the least number of post holes he can dig so as to leave no waste in the lumber 1 3- It" the population of St. Andrews is multiplied by 20, and the square rcot of the product is di\ ideil by 4, 7 times the quotient will be ^^ of the population of St. Stephen, which is 2500 : tind the iMjpulation of St. An- drews. 4- If water expand tj\ of its bulk by freering and a cubic foot of water weigh G2J^ lbs, Hnd the weight of a cubical block of ice having a surface of 54 square feet. 6. Find the value of 27 articles at £2 3s. 4d. each. 6. V/hat is the smallest amount of money with wliich I could purchase either sheep at $2|^ each, hogs at $4 J each, or calves at .f6|. 7. Find the value of 44d lbs. of wheat at $1.50 per bushel. 8. A man has 5 days' statute labour to perform. Working hours from 8 a.m. to 5 p.m., 1 hour for noon. A team and plow are reckoned equal to two men and a team and scraper equal to 3 men. He commences work with his team on Monday morning, ploughs the first half day and scrapes the rest of the time. AVhat day and at what hour witi he be done 1 lid MENTAL ARITHMETIC. 9. Divide $120 into 3 parts which shall be to one an- other as 3, 4, 5. 10. A train running at the rate of 40 miles an hour takes 46" to cross a bridge J of a mile long : find the length of the train ? 11. 4 times a number is 15 less than 6 J times the number : find it. 12- A can do a piece of work in a day, B in a day and a half, C can do twice as much work in the same time as B : how long would it take C to do a piece of work that took the other two 5 days 1 m m 'ii (15.) 1. The population of iJalhousie is 1000, of Bathurst the same, of Newcastle, 2000, and of Chatham 2500 : find the population of Montreal, which is 24y^3 times the u.iit- ed population of these towns ? 2. A boy sold a number of oranges at 2 cents each ; had ho charged 2^ cents each and sold 4 more, his receipts would have been 16 cents more : how many did he sell 1 8. Divide $65 among 3 men, so that as often as the first gets $J, ihe second shall get$J, and the third $J. 4. Four men started on a hunting expedition with provisions to last 10 days ; before they had eaten any they were joined by 5 others who had provisions to last (the five) 6 days : if one of the second party could eat twice as much as one of the first, how long would all thi pro- visions last the whole company 1 5. Divide $88 among 3 men, 4 women, and 5 boyg, giving a man $3 when a woman gets $2, and a boy $1. 6. If millers take out j'^ for toll, and a bushel of wheat produces § of its weight in flour, how many bushels of QUESTIONS FOR EXAMINATIONS. 119 wheat must be taken to the mill to receive back 220 lbs. of flour ? 7. A and B can do a work in 2 days, A and C in 3 days, B and C in 2 J days : they begin together and finish the work : how should the $6 paid for the work be divided 1 8. What must a boy ask for a pair of skates that cost $1.20, that he may take J off his asking price and still make a profit of J of their cost 1 9. When gold is at 105, what is the value of a $10 gi'eenback 1 10. A and B are 30 miles apart, and they travel to meet each other ; A goes 4 miles an hour, and after he has been travelling 2 h urs, B starts off and after travel- ling J of the whole distance meets A : find B'a rate per hour. (16.) 1. A lealer bought 113 quintals of codfish at $3.65 per quintal : what lil he pay for the whole"? 2- My horse is worth J as much again as my buggy : what fraction of the price of the horse is the buggy worth less than the horse? 8' Having laid out J of my money, and lent | of the re- mainder, I have $24 left : how much ha I 1 at first ? 4. A man has to be at a railway station at a certain time; if he walk 2J miles an hour he will be 12 minutes too late, but if he walk 3 miles an hour he will be 12 minutes toe soon : at what rate must he walk to be just in time 1 6- A number which is divided into 3 parts, which are as 1, 3, 5 ; the socond part is 24 : find the number. 6. A merchant bought wheat at $1.20 a bushel by 120 MENTAL ARITHMETIC. measure, and just gets his money back by selling it at $1.10 a bushel by weight: how many pounds to the bushel did the wheat over-run 1 7. If to J the cost of my horse you add $80, the sum will be IJ of the cost : find it. 8. 10 square yards of cloth are required, the cloth selected is one yard wide, but when sponged will shrink j*^ in length and y'g in width : how many yards must be purchased 1 9. If 40 lbs. of sea-water contain 2 lbs. of salt, how much fresh water must be added so that 3 lbs. of the mixture may contain 1-^g^- ounces of salt t 10- A boy sold 2 dozen orani»es, 5 of his gain on 1 2 was his selling price for 4 : what fraction of selling price is cost 1 11. Three men or four boys can do a work in 12 days : in what time can 3 men and 4 boys do iti 12. A school is allowed 1 J houTs for dinner ; a boy walks home at the rate of 4 miles an hour, takes 20 minutes to eat his dinner and is back iu time, walking at the rate of 3 miles an hour: how far does he live from the school ? (17.) 1. The latitude of St. John is 45° 18', that of Toronto, 43° 40* : allowing 70 miles for a degree, how many miles is St. John north of Toronto 1 2. 5 men or 8 boys can do a work in G J days : in what time will 3 men and 4 boys do 2| times as much 1 8. A man sold a horse and gained j^g of the selling price ; if he had bought him for $12 less, he would have gained J of the cost : find the cost. 4. A and B do a piece of work, A receiving $2 a day QUKSTIONS FOR EXAMINATIONS. 121 mto, liiles ^hat ive and B $3 a day ; A works twice as many days as B, and $70 is j>aid for the work : how many days did each woi'k 1 *5 The sides of a right angled triangle are G ft., 8 ft. and 10 ft. res[»ectively : finti the length of the j>erj)endi- cular on the hypothenuse. 6. Find the cost of J of ^, of 40 bushels of wheat at $1.1 2J per bushel. 7. What is the first time after 12 o'clock at which the hands of a clock form an angle of GO*^ 1 8. A boy being asked how much he was worth said: add $17 to the number of dollars, tak(5 the square root, multiply by 5, add 5 to the product, extract the sfpiare root and multi-ply by 80^ ; the result will be 402 : how much was he worth 1 9- An agc^nt sold $2700 worth of goods, receiving for his trouble $3| on every $100: how much did h(; n^ceive in all ? 10. A brakesman is noticed running in the same direction as tht^ train, on the top of a freight train going at the rate of 10 miles an hour, and is observed to take ^ a minute to pass 2 telegrM[)h polos which arri>(luct nf tho perpemllrulnr on tin* h.v|M)tliutiiiHo i>quala the product of tho othor two titles. 122 MENTAL ARITHMETIC. m answered that 30 of them were boys, and | of them, less 20, were girls : how many scholais were there in all ] 8. If 4 <^f **^y **o® ^**^ passed since I was 36 years old, how old am 1 1 4. An equal number of geese, chickens and turkeys were sold for $11.40 ; each goose brought 60 cents, each chicken 30 cents, and each turkey ^^- of the cost of a goose and a chicken : how many fowls were sold ] 5. How much water must be added to 30 gallons of braiwily, at $4 a gallon, to make it worth $2.50 a gallon? 6. A man went to market and bought a turkey and a goose weighing in all 24 lbs., the goose at 8 cents a pound and the turkey at 12 cents a pound ; the whole cosi was 12 cents more than if he had bought both at an average price of 10 cents a pound : what was the weight of the tuike> 1 7. What o'clock is it if the time past 10 is J of the time ])ast 9 1 8. One number is 7 J times another: if the difference between them is 65, what are .the numbers'? 9. liow many boxes 9 inches long, 6 inches wide and 3 inches deej), can be packed in a space 3 ft. each way? 10. A owns 5 of a lot of land, and B the remainder Thr' lot is sold, A receiving ^ of his shaie of the money and B j^ of his. B afterwards received $40 from the nur- chaser, and the balance then due was divided equally be- tween A and B : what was the lot sold fori (19.) 1. A waggon is going at the rate of 8 miles in 1 hour and 20 minutes, and a buggy is coming up behind at the m, less alU irs okl, :urkeys s, each jst of a Ions of gallon ] J and a I pountl )si( was iverage of the of the ference lie and ray ? inder uoney pui- ly bt>- I QUESTIONS FOR EXAMINATIONS. 123 [hour Ltthe rate of 6 miles in half an hour. If the biiof»y overtakes the waggon in IJ hours, how far was it behind at first? 2. The product of two nnnibera is 48 : if one of the factors is \ of 27, the otlier is ;} of what number % 3- A and B hire a livery at Brampton, to drive 12 miles, each to pay in proportion to the distance ho rides. A calls at B's residence which is 4 miles from Brampton, and leaves him there on tlieir return : what should each pay, if the hire of the rig cost 3 dollaisl 4. A'm and B's ages together are 48 years, 4 years ago B's age was \ of A's : required tlioir present ages % 6. A pole is 51 feet long, is broken by the wind, ^ of the length of the longer is equal to \ of the length of the shorter: find the length of each. 6- If If of a piece of work can be done by three men in 2 days : how many men will it take to finish the re- mainder in three days'? 7. What o'clock is it, if the time past 3 is J of the time from now to 4 ? 8. Which is the cheaper, a hat that costs $1.40 and lasts 7 months, or one that costs $2.70 and lasts 9 months'? What is saved in three years by wearing the chea[>er hat "? 9. Two blocks of wood, each 6 ft. loniif, contain the same number of cubic feet, the first is 2 ft. by 1 J, and the second is 9 inches one way : what are its dimensions the other ] 10. The expense of carpeting a room with carpet is $20, but if it was 3 ft. wider it would cc:it $25 : find the width of the room % 124 MENTAL AllITIIMETIC. (20.) 1. A parco) of 12 lbs. weight is canicd 25 miles for 30 cents, and the rate for the distance ovei- 10 miles is § of the rate for the fii*st 10 miles : how far can a parcel of 9 lbs. be carried for 20 cen^s 1 2. Two hens and 3 ducks cost $1.15 and 3 hens, and 5 lucks cost $1.85 : how nmch more does a duck cost than a hen 1 3. A does ^ of a piece c>f work in 4 hours, T> does ^ in an liour, and C finis!ies it in ^ of an hour : how long would it have taken all working together to do the work 'i 4- B travelled 102 miles in throe days ; the first day he travelled J as far as on the last two days, and on the last day J as far as on the first two days : how far did ho travel on the first day ^ 6. A dishonest milkman adds a quart of water to every gallon of mile and then sells the mixture at ^'^ more than it cost him : what is his profit on an expenditure of $101 6. A farmer having bought a certain number of sheep for $100. when a dog killed 8 of them, he sold J of the remainder for cost and received $20 : how many did he buy ] 7. Two men, A and B, enter into partnership and gain $300 ; A owns '^ of the stock, lacking $40, and gains $180 ; required the whole stock and share of each 1 8- A thief has 220 yards the start of an oflScer, in the next half mile ho gains 10 rods more, after which the office-- nins 3 ro !s while the thief runs 2 rods : how fur V wvl i. ^ i^i^ when the thief was overtaken? vi* CiiVhfeL' of the pupils in a class are girls, the other IS •QUESTIONS FOlt EXAMINATIONS. 125 half are boys; the giils own 65 books, the boys 91 ,.aeh having tbe same nunibe.-. What is the la.gest .ui. be. of pnpils that could be in each class ? 10. How many flowe.s can be planted alon™ the boidei-s of a flowe.. bed ,2 ft. long by ft. wide: Z flowers being inches apart ? 11. What is the vahio in cents of the hirgest coin with which I can pay the following three bills! 2 cro " sovereign, and I guinea? ' End of Part I. MILLER'S NEW m a Si < o 10 o M H OB H S SWINTON'S LANGUAGE LESSONS. Adapted to Canadian Schools. By J. A. MACMILLAN, B.A., Ottawa, COLLEGIATE INSTITUTE. S M *■ ft 8 I e Specially arranaedaa an introdiictory Text Book to MASON'S GBAMMAB, the authorized text book for Public Schools. The Definitions, Classification of Pronouns, Verbs and Genkrai. Treatment are uow brought into complete harmony with MaBon'8 Larger Grammar. PRICE 25 CENTS. e ii e M < t en S FROM SOUTH HASTINGS' BOARD OP EXAMINERS. Miller's New "Swinton's Language Lessons." by Macmillau, is enpecially adapted to the wants of elementary classes. The as- similation of the rules and definitions to those of the advanced text book, Mason's Grammar, is a decided improvement and makes it much preferab'e to any of the other editions. With this Edition of Language Lessons in hand, the most inexperiencid teachor may safely be entrusted with a tzrauiniur and composi- tion class. B. DAWSON, B.A ,Ph.D.,H.M.H.S., Helloville. H. M. HICKH, M. A., H.M. H School. Trenton. JOHN JOHNSTON, P.S.I., South Hastings. WM.-WILKINSON, M. A.. Head Master Model and Central School firantford. Your "5th Edition of Swinton's Language Les8ons"by Macmillan is the most complete Primary Grammar I have seen. Theeditor deserves every prfiso for making his dofluitions ngrco with those of Masons' Grammar, thus j)re venting the loss of time and con fusion, that always result from learning two sets of definition". He has accomplishel this without rendering the work a whit more difficult, or in any way destroying its pt'cnliiir character. I observe that the matter is so arranged that tliis edition can be used in the same class as your other editions without any incon- venience, i wish for it as nmuh succesN as its predi el<.ssur^ iiavo had. which since 1 speak from some months actual use of the bouk i^, perhaps, the highest pruise I can giva it. C. CLAKKSUN, B.A., Head Master. I huvH examined carefully your Model School, lirnckville. " New Swinton's Language Lessons." b / MacmiHau. The book is excellent. It was a decided improvement to bring it into entire harmony with Mason's. Tlie only difficulty I experience is to kekp it out of the Third class, for which no, text book is authorised. Pupils use the book pri< vatel^ A% au Kid to follow the oral teaching. millsr's vew swinton's lamouaoe lessons. N. GORDON, rioarl Master, Model School, Picton. After a careful perusal and comparison of the Fifth Edition of "Swinton's Lani^uriqe Lo880us,"by Macmillan, with previous editions, I find chnnf^oa of an important and highly bene- ficial character, viz :— the deliuitious are the 8ame as those in Mason's Gramma: , also the treatment of the Verb, etc., this is a step in the ri«ht direction, as the text-books iu all our PnbUo Schools should be bo arranged as to make those used in the junior classes an introduction to those (on the same subject) used in the senior divisions. I consider the plan hiRhly com- mendable as the changes do not prohibit its use with your other edition of the same excellent little work. JAMES DUNCAN, Principal Essex Model School. Have carefully examined the Fifth Edition of" Miller's New Swinton's Language Lessons by Macmillon," — The mat- ter is put in clear, concise and interesting language, and the subject is kept abreast of the age. I consider it an invaluable auxiliary to the Public School Teacher. It is as it professes to be " an introductory work on Grammar," as well as a forerunner of Mason's more advanced text->ook. W. J. SUMMERBY, Principal Kingston Model School. To prevent the loss of much valuable time, the agreement of the oJoiaentary and advanced text-books, in all essential points, is aii absolute necessity, and I am glad to find that, in definitions and general treatn^ent, the Fifth Edition of " Swinton's Lan- guage Lebsons," by Maomillan, is iu harmony with Masou s Text- book. SAMUEL B. WESTERFELT, H M.M.S. Mount Forest. As the aim is to make it uniform iu defi'iitions and clasifi- cfitiou with Mason's Grammar, and as it is such an excellent Elementarv text book, especially for the use of young teachers, 1 would heartily reoommeud its introduction. Ulan Iditor fhose con lion". Iwliit iter, n be (con- liavu the le. W. F. RITTENHOUSE, Teacher, Central School, St. Catharines. I consider •' Swinton's Lan 'uage Lessons," by Macmillan, as the l)est text book for teacliing grammar extant, and the revision, making thf dofinitituis corr spoiul with those iu the advauced text book, leaves nothing to be desired. GEO. MILDEN, Head Master, M, 8., Cornwall. Miller's new " Swinton's Language Lessons," by MacmilUm, I lo k upon as an adniirable little work, well and caieftdly got up, anil will render valu able assistance to those teachers who are engaged iu prei)aring pupils for the coming exauunatious. REV. J. MAY, L P. S., Co. Carfton. I have examined " Swindon's Language Lessons, by Macu^il- lan," and am of opinion that it will prove a very useful text-book in our schools. JAMES McBRIBN, Ins. P. S., Co Ont. Miller's new " Swinton's Language Lessons" possess too in- valua: le obaraoteristics, gradation and adaptation to youth. I would like to aee it in all our beet Bohoola. miller's new swinton'8 language lessons. W. E. SritAGUE, Head Master, Model and Public Schools, Cobourg. Millor'Bnew ' Swinton'sLanguaqe IiOS8onH,"by Macmillan.iRa decidud iinprovem )iit on pitbor of the other editious. Tlio defl- nltiouB are verbacim with tho^eiu Mason's Grammar, wliicb is certainly a very praiao worthy feat';re. The treatment of tlie Pronouns, Verbs, etc., ctd., is in strict harmony with M.isou'8 text-book, and at tlio sanio tinjo does not interfere with the sub- ject matter lu-oper— LanRnajjo Lessons. It can be introduced into classes already using any of Macmillau's former editions. It Is very d< Birable that elementary and advanced text-books slionld a^rree in the more essential points as Fifth Edition " Language LrsKons" and *' Mrpour Grammar" do. JNO. H. McFAUL, Head Master, Model School, Lindsay. The objection urged against the formtJi* editions of " Swin- ton's Language Lessons," by Macniillau.was the want of conform- ity in thedefinitiond of the parts of sftoech, to those given in the Standard Grammir. In the present Fifth Bdition, the publishers have not oi lyr placed the faulcy detlnitioua by those of Mason's, but have also given hisclasiflcation of the Pronouns and Verbs, thus rendering it no longer obligatory on the part of pupils to memorize cme set of definitions in an elementary work, to be abandoned for another set in a inore advanced treatise, a fact which must enhance th« value of and increase the demand for the Fifth Edition. JNO. IIIWIN, Head Master Model School. Belleville. Miller's new " Swinton's Language Lessons," by Macmillan, is the best elementiry grammar yet offered to our Canadian schools. The great fault in thj other editions, the want of harmony be- tween the elementary and advanccvl text-book, has been over- come by making the definitions and classification cf verbs and pronouns agree with Mason's Grammar. It cannot fail to be adopted in all our public schools. THOMAS HISLOP, Principal Model School, Haldimand Co. I have carefidly examined " Miller's Language Lefsons," by J. Macmillan, and compared it with other works of the same kmd, and I consider it superior to any. I think this work contains many exorcises which ai'e admirably sniied to pupils commenc- ing the study of English, as it is not only an excellent work for teaching composition to the junior clasKcs, but ut the same time it gives uU t at is necessary in grammar to enable a pupil to be- gin the authorized text-book on that subject. A very important uoint is this, that when the definitions in it have been pre|)ared a part of Mason's Grammar is also prepared, for the dufluitions are the aame in both. A. WARK, Principal Model School, Savnia. 1 have no nesitatlon in saying that SliUer's new " Swinton's Language Lessons," by Macmillan, is the only text-book I have yet seen that treats the subject as it ought to be presented to a class of beginners. It is certainly of the utmost importance that an introductory textbook on any subject shall be in har- mony with the more adviinced, thnretore tue changes which have been made in this edition, in the definitions and the treatment of the Verb and Pronoun in order to bring it into harmony with Maoon's, render it more valuable than the previous ones. I think its introduction into all the schools in the Province is greatly to be desired. SSONS. blic Schools, [acmillan.isa iS. Tho defl- lar, wliich is noiit of tlie mth Mason's vitli tlie sub- e introduced nor OfUtions. d text-books ilth Edition Lindsay. 1 of "Swin- b of con form- given in tho e publishers J of Mason's, 5 and Verbs, of pupils to work, to be itise, a fact demand for jville. acmillan, is ian schools, irmouy be- been over- ' verbs and ' fail to be land Go. JOiis," by J. same kmd, k contains coMimenc- t work for mme time upil to be- important 1 prepared lofiuitions Swinton's Kt-book I prosonted iportance i in har- liich have reatmeut ony with . I think I'oatly to