Hey,
Don't get too down on yourself. Your situation is actually fairly common. It sounds like it's been a while since you've taken a math class so you've probably forgotten some fundamental math skills that the GMAT tests on. Without a strong foundation in math, you'll have a hard time getting ahead in GMAT quant. I suggest that you start with our Foundations of Math Strategy Supplement to refresh yourself on the basics and then move on to our Strategy Guides. I also suggest that you read this article to help you develop a study plan for the next five weeks:
http://www.manhattangmat.com/blog/index ... tudy-plan/Best of luck!
Matt Mapplebeck
Student Services Associate
Manhattan GMAT