I'm reading between the lines here, but does this mean that you spent several months prepping and only then took a practice test? (Several tests, all recently?)
That's part of the problem right there. This isn't an academic test (even though it feels like one!). It's a performance test. Your approach has been one that would work for an academic class in school, but that same approach doesn't work on something like the GMAT. It will help you get a little better, but it won't take you to a 700.
Read this:
http://www.manhattangmat.com/blog/index ... -the-gmat/I'm going to guess in general that you have timing issues (everybody does and that will be even more true of someone who has only recently taken their first exam). In addition to the timing articles linked in the above article, add this to your reading list:
http://www.manhattangmat.com/blog/index ... -to-do-it/Read that second one after you read the In It To Win It article linked in the first article above.
Next, pay a HUGE amount of attention to the how to study / how to learn section in the first article linked above. This will help you to realize that a focus on learning content and doing a bunch of problems is not the right focus. Yes, you do have to learn the content and practice on problems, but you also have to learn the skills that the test is really testing: how to make decisions, how to set priorities, how to find flexible ways to get to solutions, etc.
You learn that by analyzing problems after you've finished them - you don't learn all that much simply by doing them. The "how to study" section (and the additional articles linked there) will help you learn how to do this.
I can't tell you how long that's all going to take, but given that you're about 100 points away from your goal, it's probably going to be at least a couple of months.
Note: from now on, ONLY take practice tests under 100% official conditions. It's a waste of time to take only the Q and V - because the real test will never let you take only the Q and V. The fact that you have to work on other stuff for an hour before you get to Q and V can then affect your performance on the two important sections... so you can't skip the earlier stuff. (That is, you can't if you want your practice test scores to reflect what might happen on the real test.)
After you've looked through those resources and gotten a better idea of how you need to study, use the below to analyze your most recent MGMAT CAT(s):
http://www.manhattangmat.com/blog/index ... ice-tests/Then come back here and tell us the results of your analysis and what you think you should do based on that analysis. We'll tell you whether we agree and advise you further. (Note: do share an analysis with us, not just the raw data. Part of getting better is developing your ability to analyze your results - figure out what they mean and what you think you should do about them!)
Take your time! Spend several days reading through the stuff I've linked and really understanding what this is going to take. Then formulate a plan and check that plan with us. :) That way, you'll know you're prepared this time to continue to figure out what you need to do and how you need to do it, so you'll know you're heading in the right direction.
Finally, just a note of encouragement. You did have to learn all of that content, so your earlier study was not a waste of time. Think of it this way: you've cleared one hurdle, or "level" of study. Now, you're moving to the second level. :)