Give stream of consciousness and then the final answer. What is the units digit of the expression 14^7−20^4?\nOptions:\n(A)  8\n(B)  3\n(C)  4\n(D)  6\n(E)  0
User
I think answer on this one should be A too. Since we know that 14^7>20^4, as Will said one should always check if the number is positive.
The final answer: (A).
Assistant