I took the GMAT today. Did excellent on verbal (95%), but my quantitative score was abysmal (78%). This coming from a person who takes pride in being mathematically superior to most of my peers is unacceptable. I have done so many practice problems in all sorts of books, but those questions are easy compared to the ones that I get on the CAT. The ones I get on the quantitative section of CAT are not only complicated, but lengthy. I can never finish on time. Of the two tests I took off GMAC's software, my quantitative score was wayyy higher, because when I ran out of time, I just chose C for the rest. Today, however, I lost track and left 6 questions unanswered.
I read in the official guide saying leaving a section unanswered can lower the percentile score by 20%. Obviously, there's a difference between leaving 20 questions blank or leaving 5 blanks, and I'd hope the algorithm is more sophisticated than lopping off a flat chunk of score.
My most immediate question then, is, with 3 minutes left, should I just go through everything left and choosing C, or am I better off doing everything as seriously as possible and leaving the section unfinished?
My long term question is how do I increase my speed on the quantitative section? I know all the math of every single question. It's just that without a calculator, the bottleneck is my hand + mental calculation speed. Being a careful person, I double check my arithmetic so that takes up a lot of time. The practice questions in different books are too easy because I just breeze through most of them only getting like one or two wrong due to careless errors.
EDIT: Not trying to come off as an elitist prick. I realize that for many people, 78 percentile is an acceptable score. However, for the programs that I want to get in (quantitative finance), a score like that on the quantitative section simply is not good enough. This is also coming from a person who has had substantial mathematical classes in college (math minor).