Max@Math Revolution wrote:[GMAT math practice question] 1.17
$$If\ x>y,\ is\ x^2>xy?$$
1) $$x>0$$
2) $$y>0$$
Statement 1:
Since x>0, we can safely multiply both sides of x>y by x:
x*x > x*y
x² > xy.
Thus, the answer to the question stem is YES.
SUFFICIENT.
Statement 2:
Since x>y and y>0, x>0.
Thus, Statement 2 implies the same information as Statement 1.
Since Statement 1 is sufficient, so is Statement 2.
SUFFICIENT.
The correct answer is
D.
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