Hi Sunita,
The type of score improvement that you're looking for is likely too difficult of a task for such a short timeframe. Thankfully, the GMAT is a consistent, predictable Exam, so you CAN train to score at a higher level - but you will need to give yourself the necessary training time (and focus on learning and practicing the proper Quant and Verbal Tactics) before you will be able to consistently score at that higher level.
Before I can offer you any additional advice for your studies, 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? What “brands” of CATs/mocks have you used?
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 apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich
Contact Rich at: Rich.C@empowergmat.com