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Jack
10-10-2013, 11:43 AM
What is the units digit of 4^{1352}.

(A) 0
(B) 4
(C) 6
(D) 8

miranda
10-10-2013, 11:44 AM
4^{1}=4
4^{2}=16
4^{3}=64
4^{4}=256

We observe that when the power is even then the unit digit of the result is 6 and when the power is odd then the unit digit of the result is 4.
Therefore the correct answer is (C).

Jack
10-10-2013, 11:50 AM
thanks a lot for your reply!