check whether (63)^n is divisible by 7 for any natural number n
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63 is divisible by 7.
So any power of 63 will be divisible by 7 also.
Like 63=7*9
63²=7*7*9*9
63³=7*7*7*9*9*9
So any power of 63 will be divisible by 7 also.
Like 63=7*9
63²=7*7*9*9
63³=7*7*7*9*9*9
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