Anonymous Wrote:is zero odd or even integer?
zero is definitely even (as are negative numbers such as -2, -4, ...)
from what i've seen, i don't think the gmat would test this sort of thing, though. when they give problems involving even, odd, divisibility, and the like, they always stick to positive integers (or at least they have in the past).
still, if you're using a number picking method and you have to pick an even number, then zero is fair game.