Get detailed explanations to advanced GMAT questions.
Is x > y?
I. x = 4y^2
II. x > 1
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked.
BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.
EACH statement ALONE is sufficient to answer the question asked.
Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.
Option C is the correct answer.
Statement I is insufficient: x = 4y^2. If x=y=0 then the answer is NO but if x=4 and y=1 then the answer is YES. Not sufficient.
Statement II is insufficient: x > 1. Not sufficient.
Together I and II, x=4y^2 –> y=√x/2 (or y=−√x/2=negative). Now, since x>1 then x>√x, so x>(√x/2=y). Sufficient.
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