I agree, this question is hard... from the moment you look at it you are like "whoa!" whereas the GMAT questions I fear the most are the tricky ones that seem deceptively easy and lead you into trap answers... those are the worst coz you don't even know you are wrong...
I think #26 statement 1 should read:
n is not divisible by 2
37 should be:
In the sequence of positive numbers x1, x2, x3, what is the value of x1












