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51. If 4% of 150 pupils in a school are absent, how many are absent ? Can 5% be absent ?

52. If of 1550 inhabitants of a town 2% died in a year, how many died? Can 3% die?

53. If I buy a horse for $200 and sell it for $225, what per cent do I gain? What per cent should I lose if I sold it for $160 ? If the man who bought it for $160 should sell it for $200, what per cent would he gain ?

54. What per cent do I gain if I sell for $3 a pair of boots that cost me $2.50 a pair ?

55. A merchant bought three cases of goods at $50 a case. He gained 33% on 2 cases and lost 162% on one case.

How much was his entire gain? What per cent ?

56. If 20% of a cargo of fruit is spoiled, at what per cent of the cost must the rest be sold to gain 20% on the entire cago ?

57. A wagon that cost $60 was sold for $48. What per cent was lost? For what price must it have been sold to gain 25% ?

58. Frank sold a knife for a dollar and gained 331% What did the knife cost him?

59. A man bequeathed 333% of an estate of $6000 to his wife, and the remainder, in equal portions, to his four children. How much did each child receive ?

CHAPTER XLVIII.

Interest is money paid for the use of money. The rate is the number of hundredths of the sum on which interest is paid for its use for a year, or other specified time.

If no time is specified a year is meant.

1. What is the interest of $100 for 5 years at 4% ? For 8 years?

The interest of $100 at 4% for one year is $4: for 5 years, $4 x 5 $20.

2. What is the interest of $100 for 5 years at 5% ? At 6% ? At 8% ? At 12%? At 3% ?

3. At 6% what is the interest of $100 for 6 months ? For 4 months ? For 3 months ?

4. At 6% what is the interest of $100 for 2 years and 6 months ? For 3 years and 4 months ? For 6 years

and 3 months ? In interest it is customary to reckon 30 days as a month.

5. At 6% what is the interest of $100 for 15 days ? For 12 days ? For 18 days ? For 21 days ? For 6 days ? For 3 days ? For 2 days?

years at

6. What is the interest of $200 for 3 4% ? At 3% ? At 7% ? At 8% ?

*). At 6% what is the interest of $100 for 3 months and 12 days ? For 7 months and 15 days ? For 6 months and 24 days?

8. At 6% what is the interest of $250 for 4 years ? For 7 years ? For 5 years ? For 3 years and 4 months ? For 1 year, 8 months, and 12 days ? _For 2 years and 6 months ?

9. The interest of a sum of money for 2 years is $12, and the rate is 6%. What sum of money is on interest? What sum would gain $36 in the same time at the same rate ?

10. What is the interest of $50 for 2 6 months at 8% ? At 6% ? At 4% ? At 5% ?

11. Find the interest of $1000 for 6 months and 20 days at 6%. At 8%. At 7%. At 4%. At

At 5%. At 9%. At 10%. 12. What is the interest of $48 for 3 years at 5% ? For 2 years and 6 months ? For 3 years and 4 months ?

13. How many tons of coal, at $6 a ton, can be bought for the interest of $200 for 3 years, at 4% ? At 6% ? • At 3% ? At 5% ?

14. At 6% what is the interest of $1 for 3 years, 4 months, and 12 days ? For 2 years, 6 months, and 18 days?

years and

3%.

CHAPTER XLIX.

The sum of money put at interest is called the principal. .

The amount is the sum of the principal and interest.

years ?

1. What is the amount of $100 on interest for 2 years and 6 months, at 6% ?

2. What is the amount of $500 for 2 years at 8% ? For 3 years ? For 5 3. What is the amount of $300 for 3 years

and 4 months, at 6 % ? At 8% ? At 5% ? At 4% ?

4. If the amount of a sum of money, on interest for 2 years, is $108, and the rate is 4%, what is the principal? What interest does the principal gain in 3 months ? What is the amount for 2 years and 6 months ?

5. Find the amount of $1000 for 6 years and 8 months, at 6%. For 3 years and 6 months. For 5 years. For 4 years.

6. If the interest of a sum of money is $0.96 a month, what is the interest for 10 days ? For 5 days ? For 15 days?

For 15 days ? For 25 days ? For 21 days ? For 30 days ? For 45 days?

CHAPTER L.

1. A sum of money on interest for 5 years at 4% amounted to $600. What was the principal ?

2. One hundred dollars amounts to $124 at 6%. How long was it on interest ?

3. At 4%, in what time will $100 gain $10 ?

4. How long will it take $200 at 6% to gain $60 ? To gain $10? To gain $15? To gain $1 ? To gain $200 ?

5. How many years, at 6%, will it take any sum to gain a sum equal to itself? At 5% ?

At 8% ? At 10%?

6. What part of itself will any sum gain in two months at 6 %? In one month ? In one day?

7. At 6% what is the interest of $300 for 8 years and 4 months ? For 4 years and 2 months ? For 6 years and 8 months ?

8. At 6%, what is the interest of $200 for 3 months and 10 days ? For 90 days ?

9. At 6%, what is the interest of $100 for 2 years, 6 months, and 15 days ?

10. At 4 %, what is the interest of $120 for 4

years, 6 months ? At 5%? At 8%? At 3%? At 7 % ? At 10% ?

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