Hi All,

This DS question is built around a few Number Property rules. You can take advantage of these rules by TESTing VALUES and keeping your TESTs simple....

We're told that M and N are NON-ZERO INTEGERS. We're asked if M^N is an integer. This is a YES/NO question.

Fact 1: N^M is POSITIVE

IF....

N = 1

M = 1

1^1 is positive

1^1 is an integer and the answer to the question is YES

IF....

N = -2

M = 2

(-2)^2 is positive

2^(-2) is NOT an integer and the answer to the question is NO

Fact 1 is INSUFFICIENT

Fact 2: N^M is an integer

The same two TESTs that we used in Fact 1 also 'fit' Fact 2....

IF....

N = 1

M = 1

1^1 is an integer

1^1 is an integer and the answer to the question is YES

IF....

N = -2

M = 2

(-2)^2 is an integer

2^(-2) is NOT an integer and the answer to the question is NO

Fact 2 is INSUFFICIENT

Combined, we have the SAME TESTs for both Facts which give us a YES and a NO answer.

Combined, INSUFFICIENT

Final Answer:

GMAT assassins aren't born, they're made,

Rich

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Rich Cohen

Rich.C@empowergmat.com

http://www.empowergmat.com

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