Check whether 6" can end with the digit'O for any natural number n.
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For any number to end with zero, it must be divisible by 2 and 5, or by 10,
as 10=2×5
Prime factorisation of 6=2×3
It can be observed that 5 is not included in the prime factorisation of 6.
Hence, 6^n cannot end with the digit zero for any natural number n.
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