If you divide 7^84 by 5, which remainder do you get?	Pick
A) 0
B) 1
C) 2
D) 3
E) 4
The units digit of 7^1 is 7.   The units digit of 7^2 is 9.   The units digit of 7^3 is 3.   The units digit of 7^4 is 1.   The units digit of 7^5 is 7.   etc...   The units digit of 7^n repeats in blocks of 4: {7, 9, 3, 1}   The remainder of 84/4 is 0.   So the units digit of 7^84 is 1.   The remainder of 7^84 / 5 is 1.   The answer is 1.
<result>B</result>
If you divide 7^84 by 5, which remainder do you get?