Timer
00:00
Answers
A
B
C
D
E
Stats
Difficulty—
If x is negative, is x < -3?
(1) x^2 > 9
(2) x^3 < -9
A
(1) x^2 > 9
(2) x^3 < -9
A
Hi AbeNeedsAnswers,
We're told that X is NEGATIVE. We' asked if X < -3. This is a YES/NO question. We can answer it with a mix of basic math and TESTing VALUES
1) X^2 > 9
With this inequality, there would typically be two 'groups' of answers: those that are GREATER than 3 and those that are LESS than -3. Here though, the prompt tells us that X is NEGATIVE, so there is only one group of answers: those LESS than -3. Thus, the answer to the question is ALWAYS YES.
Fact 1 is SUFFICIENT
2) X^3 < -9
IF....
X = -3, then the answer to the question is NO.
X = -4, then the answer to the question is YES.
Fact 2 is INSUFFICIENT
Final Answer: A
GMAT assassins aren't born, they're made,
Rich
