show that one and only one out of P,P+2 or P+4 is divisible by 3 where P is any positive integer
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Since P is any integer,
Lets take P = 2
P+2 = 4, P+4 = 6
Out of 2,4,6, only 6 is divisible by 3
Hence proved
Lets take P = 2
P+2 = 4, P+4 = 6
Out of 2,4,6, only 6 is divisible by 3
Hence proved
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