Hi gaukharaya,
The Quant section of the GMAT isn't really a 'math test' (like the ones that you would have taken in High School or College); it's more of a critical thinking test that involves fairly straight-forward calculations. As such, taking an 'all math, all the time' approach will likely make that section more difficult to deal with. To score at the highest levels, you need a mix of solid math skills (although you don't have to be a 'math genius') and the Tactics, pattern-matching ability and knowledge of the little 'secrets' behind the Quant section.
1) How long have you been studying for the GMAT?
2) What materials have you been using?
3) How have you scored on your CATs (including the Quant and Verbal Scaled Scores)?
GMAT assassins aren't born, they're made,
Rich