Hi RahulSha,
While an
Error Log is certainly useful (especially when it comes to defining 'weak areas' and why you're getting questions wrong), the only practical way to assess your actual 'ability level' (and how you might perform on the Official GMAT) is to take a FULL-LENGTH CAT/MOCK under realistic testing conditions that match-up with how you will take the Official GMAT. Ultimately, that's the data that we need to get into (as 65% accuracy might be 'good' or 'bad' depending on the context).
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:
Studies:
1) How long have you studied? How many hours do you typically study each week?
2) What study materials have you used so far?
3) On what dates (or approximate dates) did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your overall goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich