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math

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give me answer show that one and only one out of n,n+4,n+8,n+12 and n+16 is divisible by 5, where n is any positive integer

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    To be evenly divisible by 5, the number must end in 0 or 5. If n is an integer, one and only one of that set of numbers can end in 0 or 5.

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