For some integer m, m^2 - 5 is divisible by all of the following EXCEPT
Options:
(A) 38
(B) 41
(C) 30
(D) 31
(E) 29 Now, let's think a bit. Some random thoughts:
Hint: m^2-5 (m is an integer) is never multiple of 3 (try to prove this), hence 30 is out.
The final answer: (C).