Is $x>0$? Statement I: $x^3=27$. Statement II: $x^2=9$. Choose the standard data-sufficiency option.

Question

Is $x>0$?

Statement I: $x^3=27$.

Statement II: $x^2=9$.

Choose the standard data-sufficiency option.

Option A — Correct answer

A

Correct choice.

Option B

B

Option C

C

Option D

D

Option E

E

Explanation

Statement I alone is sufficient because $x=3$, which is positive. Statement II alone is insufficient because $x$ could be $3$ or $-3$. Hence the answer is A.

Chapter Mock 16: Data Sufficiency