Answers

2015-06-09T17:14:24+05:30
Difference between n and n+2 = 2 and n+2 and n+4 = 2 Therefore, if n is divisible by 3, then sum of digits of n = 3x, where x is an integer. Then, n+2 and n+4 not divisible because they add upto 3x +2, 3x +4
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