GMAT Math : Arithmetic
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Example Questions
Example Question #1292 : Data Sufficiency Questions
Statement 1: 
Statement 2: 
Both statements TOGETHER are sufficient to answer the question, but neither statement ALONE is sufficient to answer the question.
Either statement ALONE is sufficient to answer the question.
Statement 2 ALONE is sufficient to answer the question, but Statement 1 ALONE is not sufficient to answer the question.
Both statements TOGETHER are insufficient to answer the question.
Statement 1 ALONE is sufficient to answer the question, but Statement 2 ALONE is not sufficient to answer the question.
Both statements TOGETHER are sufficient to answer the question, but neither statement ALONE is sufficient to answer the question.
A negative integer to an even power is positive:
Example:
A negative integer to an odd power is negative:
Example:
A positive integer to an odd power is positive:
Example:
So, as seen in the first two statements, knowing only that base 
The answer is that both statements together are sufficient to answer the question, but neither statement alone is sufficient.
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