Answer the following question, with explanation first.
A certain number when divided by 45 leaves a remainder 31, what is the remainder if the same number be divided by 15?\nOptions:\n(A) 13\n(B) 11\n(C) 9\n(D) 1\n(E) 3

(D)
45 + 31 = 76/15 = 1 (Remainder).

Thus, the answer is (D)