Give a quick stream of consciousness before answering the following question. What is the units digit of the expression 14^717^4?
Options:
(A) 0
(B) 3
(C) 4
(D) 8
(E) 6
I think answer on this one should be D too. Since we know that 14^7>17^4, as Will said one should always check if the number is positive.
The answer: (D).