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Check whether the no. 21^n can end with digit 0 or not for any natural no.I |
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Answer» GIVEN, = 21^n = ( 3 * 7 ) ^ n = 3^n * 7^n For any number to END with 0 it should be in the FORM of 2^m * 5^n, but here it is not so.Hence,21^n can't end with 0. |
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