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AIM TO CRACK GMAT
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x = 8y + 11AIM TO CRACK GMAT wrote:If x=8y+11 then which of the following cannot be a divisor of x.(y is a whole number)?
a) 3
b) 5
c) 7
d) 12
[spoiler]OA = D[/spoiler]
So, x = (EVEN NUMBER)(y) + ODD
If y is an integer, then (EVEN NUMBER)(y) = EVEN,
So x = EVEN + ODD
Finally, x = ODD
If x is odd, it cannot be divisible by an even number.
So, x cannot be divisible by 12 (since 12 is even)
Answer: D
Cheers,
Brent
