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05 Apr 2023, 01:30
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B
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Difficulty:
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Question Stats:
81% (00:59) correct
19%
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based on 160
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Is integer N odd?
(1) N is a factor of 100.
(2) N is a factor of 135.
(1) N is a factor of 100.
(2) N is a factor of 135.
05 Apr 2023, 01:49
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Imo B is the correct answer.
Factors of 135 = 5 and 27 --> both odd.
Factors of 100 = odd and even.
So we know for sure that n is odd if it is a factor of 27.
Am i right? I always struggle with these questions. KarishmaB Bunuel gmatophobia
Factors of 135 = 5 and 27 --> both odd.
Factors of 100 = odd and even.
So we know for sure that n is odd if it is a factor of 27.
Am i right? I always struggle with these questions. KarishmaB Bunuel gmatophobia
05 Apr 2023, 03:39
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nicbo
Yes, if we know that N is a factor of 135, we know for sure that it is odd because all factors of 135 are odd.
\(135 = 3^3 * 5\)
There is no 2 in there. Hence it has no even factors.
Number properties is an important topic for GMAT. So invest enough time if you struggle with it.
