lost on a GMAT question

[Julien]

If x is an integer and y=3x+2, which if the following CANNOT be a divisor of Y?
a 4
b 5
c 6
d 7
e 8



wtf are they asking?

Thanks,
Julien

[Julien]

answer is 6 btw

[Jonathan M3]

I haven't had anything to do with the word "integer" in ~4 years so I'm backing out of this one.

[Julien]

I *think* that they meant X and Y must be integers... cause than going backwards through the problem we see that no (integer/6 - 2) x 3 = another integer

[FredK]

This is a factoring problem.

If x is an integer, it follows that y MUST be an integer.

Make a table:
if x=1, then y=5. Since 5 is a divisor of 5, eliminate choice b
x=2, then y=8. eliminate a and e
x=3, then y=9
x=4, y=14. eliminate d

You are left with only choice c, 6.