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Re: If x is a positive integer, is the remainder 0 when (3x + 1) [#permalink]
02 Jan 2013, 08:34
If x is a positive integer, is the remainder 0 when (3^x + 1)/10? (1) x = 3n + 2, where n is a positive integer. (2) x > 4
The remainder will be zero when x is 4n-2 i.e. 2, 6, 10, 14 etc. Statement 1 tells us that x=5, 8,11, 14 etc Not sufficient statement 2 is not sufficient On combinng also, the information is not sufficient. Hence +1E