A multiple choice test consists of 4 questions, and each question has 5 answer choices. In how many ways can the test be completed if every question is unanswered?
Options:
(A) 24
(B) 120
(C) 625
(D) 720
(E) 1024 Hmmm, my stream of consciousness:
5 choices for each of the 4 questions, thus total of 5*5*5*5 = 5^4 = 625 ways. So, the answer is (C).