Algebra

DS Question of the Day

If a^x=b^y, where a, b, x, and y are positive integers, is x divisible by y? (1) a is an odd number (2) y is an odd number

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GMAT Problem Solving

GMAT Question of the Day : Data Sufficiency

If x, y, and k are positive numbers such that (x/(x+y) (10) + (y/(x+y) (20) = k and if x < y, which of the following could be the value of k? A) 10 B) 12 C) 15 D) 18 E) 30

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