Q: For some integer n, n^2 - 5 is divisible by all of the following EXCEPT
Options:
(A) 41
(B) 38
(C) 29
(D) 30
(E) 31 Let's give some random thoughts before answering.
Hint: n^2-5 (n is an integer) is never multiple of 3 (try to prove this), hence 30 is out.
Therefore, the answer is (D).