Sinossi
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 Excerpt: ...Are 3 and 5 prime factors of 15? 12. A number is exactly divisible: By 2, if its units figure is divisible by 2. By 3, if the sura of the digits is divisible by n. By 4, if its tens and units are together divisible by 4. By 5, if the units figure is 5 or 0. By 6, if it is divisible by 2 and 3. By 8, if the last three figures are divisible by 8. By 9, if the sum of its digits is divisible by 9. 13. Find the prime factors of 210. What prime number will divide 210? Divide by 2. What 2 ) 2iO is the quotient? What prime number will divide 105? Di 3 ) 105 viding by 3, what is the quotient? What prime number will c N oc divide 35? and what is the quotient? Make a list of your divisors and last quotient. These are the prime factors of 210. 14. Find the prime factors of: 2x3x5x7 40 100 200 625 1,000 i ORAL. 1. A merchant had a roll of ribbon 48 ft. long. From it he cut three strips, each 8 ft. long. How many feet had he left in the roll? How many yards? 2; Five times Bessie's age is 50 years. How old is she? 3. A merchant bought cloth at $1.70 a yard, and sold it at $2.25 a yard. How many yards must he sell to make $1.10? 4. If pencils cost 72 a dozen, how much must I pay for 7 pencils? 5. A man earned $45, and spent § of it. How much did he spend? i 6. James had $36, William had $ as much, and Andrew § as much. How much had William and Andrew each? 7. What are f of 24? 66? 42? 54? 8. What are? of 49? 63? 77? 28? 9. What are of 32? 48? 64? 96? 10. % of 90 are how many? 11. 1% of 80 are how many? 12. T7D of 90 are how many? 13. of 96 are how many? 14. of 54 are how many? 15. Reduce to improper fractions: 2J, 3J, 4§, 4', 8J, 5J, 6J, 8J. 16. Reduce to mixed numbers: y, J, V, Y,, Vs Jj4, ¥. 17. How much will 5 pairs of shoes cost at $3i a pair? 18. W...
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