GRE Question of the Day (February 12th)

Math

If p and q are both positive integers such that \({\frac{{p}}{{9}} + \frac{{q}}{{10}}}\) is also an integer, then which one of the following numbers could p equal?

(A) 3
(B) 4
(C) 9
(D) 11
(E) 19

Correct Answer - C  - (click and drag your mouse to see the answer)

Question Discussion & Explanation