Hi GMATt1234,
GMAC has publicly stated that the Official Score that you earn on Test Day is within +/- 30 points of actual ability. Assuming a similar 'swing' in how your CATs function, your last 4 CAT score results - along with your Official GMAT Score - show that you essentially performed the same each time (about 600 +/- a few points). These results show a relatively consistent performance - you handle certain aspects of the CATs consistently well, but you're also making certain consistent mistakes (the Q47 and V36 are both "outliers" - so we can't say for sure how accurate those individual results were). With 3 months, you could potentially improve a great deal on this 610. Raising a 610 to a 700+ will require that you make significant improvements to how you handle BOTH the Quant and Verbal sections.
Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you've been studying and your goals:
1) Did you use any other study materials besides that course?
2) When are you planning to apply to Business School?
3) What Schools are you planning to apply to?
4) Going forward, how many hours do you think you can consistently study each week?
You might also choose to purchase the Enhanced Score Report. While the ESR doesn't provide a lot of information, there are usually a few data points that we can use to define what you should work on to score higher. If you purchase the ESR, then I'll be happy to analyze it for you.
GMAT assassins aren't born, they're made,
Rich