robu1 wrote:
. If x and y are integers and 450x = 120y, which of the following must be an
integer?
(1) xy/60
(2) 15x/4y
(3) 4x/15y
(A) I only
(B) II only
(C) I and III only
(D) I and II only
(E) I, II, and III
I am not ok with official answer. please explain.
Discussed here: https://gmatclub.com/forum/if-x-and-y-a ... 00245.html Hope it helps.
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