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2015-06-01T21:09:49+05:30

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Natural number n.

12^n\\\\12^0=1\\12^1=12\\12^2=144\\12^3\ ends\ with\ 8\\12^4\ ends\ with\ 6\\12^5\ ends\ with\ 2

And the units digit of 12^n will be : 1, 2, 4, 8, 6, 2, 4,  8, 6 ....

1 5 1