I just came by this one and have no idea how the answer could be A. Could somebody please explain...
If x and y are positive integers, what is the value of x?
(1) 3x5y = 1,125 (x and y are power signs)
(2) y = 3
But... why not D?
Statement 2 does not give us ANY info about "x". So we can ignore it (yes ! as simple as that
"You have to find it. No one else can find it for you." - Bjorn Borg
Check out my GMAT blog - GMAT Tips and Strategies