Is z negative? (1) z² = 9 (2) z < 0
AStatement (1) alone is sufficient; (2) is not.
BStatement (2) alone is sufficient; (1) is not.
CBoth statements together are sufficient; neither alone is.
DEach statement alone is sufficient.
EStatements together are not sufficient.
Answer & Solution
Correct answer: B. Statement (2) alone is sufficient; (1) is not.
1. (1) z = ±3. 2. (2) gives z < 0 directly. Sufficient.
_Source: 501-GMAT-Questions Ch DS / Manhattan Quant Bank_
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