puneet2329 wrote:question from GMAT: Can some one please explain the answer
p is a integer grater than 1, is p a prime number?
1) p is a factor of 13
2) p is a factor of 78
Target question:
Is p a prime number?
Statement 1: p is a factor of 13
There are only 2 positive factors of 13. They are 1 and 13.
Since we're told that p > 1, we can be
certain that
p = 13
Since we can answer the
target question with certainty, statement 1 is SUFFICIENT
Statement 2: p is a factor of 78
There are several values of p that meet this condition.
p could equal 2 or 3 or 13 or ...
Since we cannot answer the
target question with certainty, statement 2 is NOT SUFFICIENT
Answer =
A
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
