Question

find the unit digit of 123^999

Answer 1

hey , your answer is

divede 999 by 4
so, the remainder is 3

thus, 3^3 = 27

therefore , unit digit of 123^ 999 is 7


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Answer 2

The unit digit will be 7.just seemultiply the last digit with last digit the unit digit will always be that.

Hope it helps

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