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" How much did he invest at 5 per cent ? 37. Eight years ago a man was three times as old as his son, and five years hence four times the son's age will equal twice the father's age. Find the age of each. 38. A certain number exceeds five times the sum... "
Grammar School Algebra - Page 140
by George Edward Atwood - 1900 - 253 pages
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Arithmetical examples

Thomas Dalton - 1866 - 182 pages
...number of legatees ? 9. What fraction of ¡6225 is £3. 4s. ? Reduce the result to a decimal. 10. Thirty years ago a man was three times as old as his son whoso present ago is 45. How old is the father? . 11. Express '4568 as a vulgar fraction in its lowest...
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The examination arithmetic. With answers

William Abbotts Snaith - 1876 - 166 pages
...eighty, and half their difference is eight hundred and four : what are the numbers,! LI. 1869. 26. Thirty years ago a man was three times as old as his son, whose present age is 45 : how old is the father ? LI. 1870. 27. A number of marbles are placed in small...
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Elementary algebra, with brief notices of its history

Robert Potts - 1879 - 668 pages
...and in four years A will be three times the age of В ; what are their respective ages ? 3. Thirty years ago a man was three times as old as his son, whose present age is 45 ; how old is his father ? 4. Two years ago, A 's age was three times В'в...
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Elementary algebra: with brief notices of its history

Robert Potts - Algebra - 1879 - 672 pages
...and in four years A will be three times the age of Б ; what are their respective ages ? 3. Thirty years ago a man was three times as old as his son, whose present age is 45 ; how old is his father ? 4. Two years ago, Л 's age was three times -5's...
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The Cambridge Examiner, Volume 2

Education, Higher - 1882 - 498 pages
...+ 40 = 4. Solve the equations : (i) V» + 7 + V3(a;+3) = Vfl; + 9; («) 5. Simplify: (i) 6. Thirty years ago a man was three times as old as his son, whose present age is 45. How old is the father ? 7. If a : b :: c : d, shew that (i) a2-b2:b(ab)::c^-d2:d(cd);...
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Exercises in Algebra

George Edward Atwood - Algebra - 1898 - 244 pages
...and С can do it in b days ; A and С can do it in с days. In how many days can each do the work ? 37. Eight years ago a man was three times as old as Ms son, and five years hence four times the son's age will equal twice the father's age. Find the age...
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Woolwich Mathematical Papers for Admission Into the Royal Military Academy ...

Eldred John Brooksmith - Mathematics - 1901 - 368 pages
...remainder gain 6 per cent. ; what average rate per cent. do you make on the whole sum invested ? 13. Ten years ago a man was three times as old as his son, and five years hence he will be only twice as old. What are their ages respectively ? 14. A farmer bought 6 oxen and 100...
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The School World: A Monthly Magazine of Educational Work and Progress, Volume 4

Education - 1902 - 678 pages
...sold them for • pounds and made / pence profit. Find n in terms "<•'•, I, r, s and /. (9) Ten years ago a man was three times as old as his son, and in twenty years time the father will be half as old again as the son. Find their present ages. (>o)...
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Annual Report of the Commissioners ..., Volume 70

1905 - 946 pages
...florins. D Papen-. — 6. Solve the equation — 1(2* + 5) + 1(2*- 5) = 1(3* + 1) + J(3* - 1). 7. Fourteen years ago a man was three times as old as his son. If he is now twice as old, find the present age of each. 8. Extract the square root of — 3* 10z»...
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Exercises in Algebra

George Edward Atwood - Algebra - 1909 - 278 pages
...fraction ? 34. A and B together had $ 99,000. After A had lost f of his money in speculation and B f of his, they together had $ 61,000 left. How much...will be ten and the remainder five. Find the number. 89. After A had sold sixty-two sheep to B and eighteen to C, they each had the same number. Before...
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