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Sign, Zero, and Boundary Cases
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GMAT
GMAT.189 Sign, Zero, and Boundary Cases
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Data Sufficiency. Determine whether the statements are sufficient to answer the question. Let a be a real number. Is a <= 0? Statement (1): a
2
<= 4. Statement (2): a <= 2.
A
Statement (1), a
2
<= 4, is sufficient to decide whether a is at most 0, but Statement (2), a <= 2, is not.
B
Statement (2), a <= 2, is sufficient to decide whether a is at most 0, but Statement (1), a
2
<= 4, is not.
C
Statements (1) and (2) together are sufficient to decide whether a is at most 0, but neither statement alone is.
D
Even together, Statements (1) and (2) are not sufficient to decide whether a is at most 0.
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