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If \(M\) and \(x\) are positive integers greater than \(1,\) what is the unit digit of \(M^x?\)
(1) \(M\) when divided by \(5\) gives a remainder of \(1.\)
(2) \(M=21\)
Answer: B
Source: e-GMAT
(1) \(M\) when divided by \(5\) gives a remainder of \(1.\)
(2) \(M=21\)
Answer: B
Source: e-GMAT
