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What number must be added in each term of the fraction 731, so that it may become 517.

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Important Questions on Ratio, Proportion and Variation

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If x varies inversely as y3-1 and is equal to 3 when y=2, find x when y=4.
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If x varies as y and y=4 when x=12, find x when y=15.
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X varies jointly as Y and Z, and X=6 when Y=3, Z=2, find X when Y=5, Z=7.
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If x varies as y directly, and as z inversely, and x=12 when y=3, find z when x=4, y=5.
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Divide 1400 into three parts in such a way that half of the first part, one-fourth of the second part and one-eighth of the third part are equal.
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Divide 5000 among A, B, C and D, so that A and B together get 37 of what C and D get together, C gets 1.5 times of what B gets and D gets 43 times as much as C. Then, the share of B is _____.
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If pq+r=qp+r=rp+q, then each fraction is equal to _____.