26. What is the interest of $130.60 for 6 months at 7% ?

27. What is the interest of $130.60 for 8 months, at 7% ?

28. What is the interest of $516 for 123 days at 7 % ? 29. What is the interest of $234.92 for 33 days, at 7 % ?

30. What is the interest of $420 for 63 days, at 9% ? 31. What is the interest of $226 for 2 years 3 months at 5% ?

32. What is the interest of $210 for 4 years 5 months at 7% ?

33. What is the interest of $67.42 for 1

15 days, at 6% ?

34. What is the interest of $333 for 5 5 days, at 8% ?

year 7 months

35. What is the amount of $54.98 for 6 months 20 days, at 7 %?

36. What is the amount of $45.15 for 1 year 4 months 9 days, at 5 % ?

37. What is the amount of $100 from May 16, 1879, to August 31, 1881, at 10 % ?

173. What is interest?

QUESTIONS.

174. What is the principal? 175.

What is the rate? 176. What is the amount?

177. What part of the principal is the interest at 6 per cent for 1 year? For 2 months? For 6 days?

178. How do you compute interest at 6 per cent? How is amount found? 179. How is the interest found when the rate is other than 6 per cent?

GENERAL REVIEW.

180. 1. If 5 oranges cost 10 cents, how much will 12 oranges cost?

2. If 7 yards of cloth cost $28, how much will 9 yards cost?

3. If 8 pounds of sugar cost 72 cents, what will 6 pounds cost?

4. If 5 quarts of milk cost 40 cents, what will 71⁄2 quarts cost?

5. When $6 will buy 24 yards of cloth, how many yards will $8 buy?

6. If 9 pounds of veal cost 54 cents, how many pounds can be bought for 42 cents?

7. If 7 plows can be bought for $77, how many can be bought for $44?

8. When $8 will buy 40 rakes, how many can be bought for $11?

9. If 12 men can do a piece of work in 6 days, how many days will it take 9 men to do the same?

Solution. If 12 men can do a piece of work in 6 days, it will take 1 man 12 times 6 days, or 72 days, to do it, and 9 men of 72 days, or 8 days.

10. If 7 men can dig a ditch in 8 days, how many days will be required for 14 men to dig it?

11. If 6 horses eat a bag of oats in 10 days, how many horses will eat the same quantity in 15 days?

12. How long will it take 5 men to reap a field, if it takes 15 men 3 days to reap it?

13. How long will it take 9 men to build a wall, if it takes 6 men 6 days to build it?

14. If 7 books cost $21, what will 11 books cost?

15. When 8 barrels of flour will pay for 12 yards of broadcloth, at $6 a yard, how much is the flour per barrel ?

16. If 5 men can hoe a field of corn in 9 days, in what time can 15 men hoe it?

17. When 10 oranges will pay for 20 apples, at 2 cents each, what is the price of each orange?

18. When 10 bushels of wheat will pay for 5 cords of wood, at $4 per cord, how much is the wheat per bushel ?

19. of a pole is above ground, and 3 feet is of the part above ground. What is the length of the pole?

20. If a ship can sail at the rate of 10 miles per hour, how far will it sail in g of a day?

21. At 50 cents a foot, what will a rod of iron fence cost?

22. From a pile of wood containing 6 cords of wood, there were sold 2 loads each 3 feet high, 4 feet wide, and 4 feet long. How much remained?

23. A piece of land is 40 rods square. How many more square rods does it contain than two pieces each 20 rods square?

24. A farmer sells his corn at 48 cents a bushel, which is 80% of what he sold for last year.

for last year?

What did he sell

25. What per cent does a grocer make by selling his goods at of their cost?

26. My price for a horse, which is held at 25% above cost, is $100. If I should sell him at 25% off my price, how much should I lose?

27. What is the interest on $120, for 2 years 3 months at 6% ?

28. If you should lend $6 at 7%, how much will be due you at the end of 2 years 6 months?

WRITTEN EXERCISES.

29. A merchant receives from the sale of coffee $519.60, of tea $310.20, and of sugar $640.45. How much does he receive from the whole?

30. If you should buy a farm for $5600, and sell a part of it for $ 3780, and the remainder for $2340, how much would you make by the operation?

31. The difference of two numbers is 397, and the smaller number is 532; what is the larger number?

32. A and B together had $655, but A having lost $65, they then had equal sums; how much had B?

33. A merchant bought 55 bales of cloth, each bale containing 36 pieces, and each piece 30 yards; how many yards did he buy in all?

34. Two travelers set out from towns 363 miles distant and travel towards each other till they meet, when it appears one has traveled 93 miles farther than the other; how far had each traveled?

35. If the product of two numbers is 1960, and one of the numbers is 35, what is the other number?

36. If I have $3642, and purchase 404 barrels of flour at $9 a barrel, how much shall I have left after paying for the flour?

37. How many bushels of wheat, at $1.25 a bushel, will pay for 10 yards of broadcloth, at $4.50 per yard?

38. Divide the product of 35 × 20 by 640 - 515. 39. If 5 tons of hay cost $106.25, what will 13 tons cost?

40. In what time will 48 men do a piece of work that 12 men can do in 24 days?

41. When 15 pounds of sugar can be bought for $ 1.80, what will 18 pounds cost?

42. How far can a man travel in 18 days, at the rate of 378 miles in 6 days?

43. If a man travels 1134 miles in 18 days, how many miles will he travel in 6 days?

44. How many pounds of coffee can be bought for $21, if 30 pounds cost $6?

45. When 18 pounds of sugar can be bought for $ 2.16, what will 15 pounds cost?

46. If 9 acres of grass will pasture 15 cows, how many cows will 6 acres pasture?