Hi mattiscool,
Beyond the "math" subjects that the GMAT Quant section focuses on, you have to also learn the various tactics to answer those questions. By definition, the Quant section of the GMAT is NOT a "math test"; that section uses the realm of "math" to test you on a number of different things: organization, accuracy, attention-to-detail, pattern matching, pacing, flexibility, thoroughness, etc.
If your initial interest is to make sure that you have the math "subjects" covered, then that's understandable, but there's far more to the process than just that.
Have you taken any full-length practice CATs yet? If so, then how did you score on the Quant section? If not, then you can download 2 FREE CATs from
www.mba.com. You should plan to take one, early in your studies, so you can get a sense for your initial strengths and weaknesses.
GMAT assassins aren't born, they're made,
Rich