Question

show that exactly one of the numbers n,n+1 or n+2 is divisible by 3

Answer 1

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_______________________________________Let n be 2

¤If n is 3,then it is divisible by 3

¤If n is 3,n+2=5 is not divisible by 3

¤If n is 3,then n+4=7 is not divisible by 3

=====================!!!====================this clearly proves that only one among them is divisible by 3.

Hope it helps