For some integer y, y^2 - 5 is divisible by all of the following EXCEPT
Options:
(A) 29
(B) 30
(C) 31
(D) 38
(E) 41 Let's think first. Stream of consciousness:
Hint: y^2-5 (y is an integer) is never multiple of 3 (try to prove this), hence 30 is out.
So, the answer is (B).