Show that 12n cannot end with digit 0r 5 for any natural number n
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12^1 end's with the digit 2
12^2end's with the digit 4
12^3 end's with the digit 8
12^4ends with the digit 6
12^5 end's with the digit 2
it is again & again comes in the place of units
so, 12^n doesn't end's with the digits 0,5
12^2end's with the digit 4
12^3 end's with the digit 8
12^4ends with the digit 6
12^5 end's with the digit 2
it is again & again comes in the place of units
so, 12^n doesn't end's with the digits 0,5
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