(i) Three sevenths of 364 are 1 half of what number? (j) One seventh of 434 is 2 thirds of what number? 11. Twenty is of 25. If 25 bags of salt are worth $15, 20 bags of salt are worth dollars. (k) If 25 acres of land are worth $640, how much are 20 acres worth at the same rate? 12. Twenty-five is of 20, or and times 20. If 20 bushels of apples are worth $12, 25 bushels of apples are worth dollars. (1) If 20 barrels of salt are worth $22.40, how much are 25 barrels of salt worth at the same rate? 13. If 12 qt. of nuts are worth 404, 9 qt. of nuts are worth cents. 18. Russel earned 604; he spent 10% of his money for a tablet and 20% of it for a book; the tablet cost cents 19. Ten per cent of the sheep in a certain flock were black; there were 8 black sheep; in all there were sheep. 1. 40 per cent of 55 (a) Find 40% of 575. (c) Find 75% of 676. (e) Find 3% of $254. 7%; he collected $635. PERCENTAGE. (g) A lawyer's commission for collecting money was How much of the money should should he "pay over" to the man he keep and how much (n) A lawyer's commission for collecting money was 7%; his commission amounted to $63. How much did he collect and how much should he " for whom he collected the money? pay over to the man (0) Eighteen dollars are what per cent of $600? This means, find how many hundredths of $600, $18 are. REVIEW. 1. The prime factors of 63 are and (a) What are the prime factors of 215? (b) Of 470? 2. Three, 3, 3, and 2 are the prime factors of (c) of what number are 3, 5, 2, and 23 the prime factors? 3. Add and . The 1. c. m. of 8 and 3 is 5 (d) Add 1, 1⁄2, and . The 1. c. m. of 9, 12, and 3 is 4. Multiply $324 by (e) Divide & by. The 1. c. m. of 9 and 12 is . This means 5. One half of a rod is and feet. (g) Twenty-six and one half rods are how many feet? (j) How many yards in 42 rods? (k) In 64 rods? 8. When wheat is 70¢ a bushel, 240 lb. cost (1) When wheat is 90¢ a bushel, how much will one ton of wheat cost? 9. A pile of wood 32 feet long, 4 feet wide, and 4 feet high contains cords. (m) How many cu. ft. in a pile of wood 32 ft. by 4 ft. by 2 ft.? 10. If 12 lb. of sugar are worth 45¢, at the same rate 8 lb. are worth cents. (n) If 12 boxes of soap are worth $22.50, how much are 8 boxes worth at the same rate? MISCELLANEOUS PROBLEMS. 1. The perimeter of a rectangular surface 7 feet by 9 feet is feet. (a) How many rods of fence are required to enclose a rectangular field 38 rods by 54 rods? 2. If the sun rises at 7 o'clock and sets at 4:30, from sunrise to sunset it is hours and minutes. (b) If the sun rises at 7:14 and sets at 4:28, how long is it from sunrise to sunset? 3. A man bought 16 dozen eggs at 10¢ a dozen; he lost 25 per cent of them by decay; he sold the remainder at 12¢ a dozen; he lost cents. (c) A man bought 360 dozen eggs at 94 a dozen; he lost 25% of them by decay; he sold the remainder at 114 a dozen. How much money did he lose? is 4. From midnight Monday to midnight Wednesday it hours. (d) How many hours in a week? (e) In the month of January? 5. At 45 each, 3 copies of "Robinson Crusoe will dollar and cents; for $1.80 I can buy cost copies. (f) How much will 7 copies of "Robinson Crusoe" cost? (g) How many copies of "Robinson Crusoe" can I buy for $10.35? (h) For $4.95? (i) Add four thousand three hundred twenty-four and twenty-five thousandths, and seven hundred forty-six and thirty-four hundredths, and seventy-five and eight tenths. (j) From forty-five hundred subtract forty-five hundredths. |