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If n is an integer and 2 < n < 6, what is the value of

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Source: — Data Sufficiency |

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by Jay@ManhattanReview » Tue Nov 14, 2017 10:45 pm
AAPL wrote:If n is an integer and 2 < n < 6, what is the value of n?

(1) n is a factor of 15.
(2) n is a factor of 21.

The OA is B.

Please, can any expert assist me with this DS question? I don't have it clear and I appreciate if any explain it for me. Thanks.
Since n is an integer and 2 < n < 6, the possible values are: 3, 4, and 5.

(1) n is a factor of 15.

Factors of n are 1, 3, 5 and 15. n can be 3 or 5. No unique value. Insufficient.

(2) n is a factor of 21.

Factors of n are 1, 3, 7 and 21. The value of n is 3. A unique value. Sufficient.

The correct answer: B

Hope this helps!

-Jay
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