Find a number ‘a’ between 0 and 9 such that ‘a’ is congruent to 7^1000 mod 10.

Find a number ‘a’ between 0 and 9 such that ‘a’ is congruent

1.	Find a number ‘a’ between 0 and 9 such that ‘a’ is congruent to 7^1000 mod 10.
A.	2
B.	1
C.	3
D.	4
Answer» C. 3