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Difficulty:
35%
(medium)
Question Stats:
70% (02:07) correct
30%
(02:04)
wrong
based on 81
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If x and y are factors of 165,165, where x > y > 0, which of the following cannot be the value of x − y?
(A) 2
(B) 4
(C) 8
(D) 15
(E) 28
_________________
(A) 2
(B) 4
(C) 8
(D) 15
(E) 28
_________________
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IanStewart
Expert
GMAT Tutor
Joined: 24 Jun 2008
Last visit: 13 Sep 2026
Posts: 4,146
Location: United States
GMAT 1: 780 Q51 V47
Expert reply
GMAT 1: 780 Q51 V47
Posts: 4,146
All of the factors of 165,165 must be odd, so x - y = odd - odd = even, and x - y can't possibly be 15.
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