Hi sagnik242,
Many Test Takers who use a "book heavy" study approach end up getting 'stuck' at a particular scoring level. Even the best books are limited in what they can teach you; they also can't force you to approach questions in a certain way and their explanations are often one-sided. From the resources that you've listed, it sounds like you used a book-heavy approach, so that might be part of your problem. As such, you might need to invest in some new non-book resources and learn/practice some new Tactics?
1) When you took the GMAT the second time, did you have any pacing issues in the Quant section? Did you have to guess on a bunch of questions at the end just to finish (or did you leave any questions unanswered?)?
2) From your last post, it's not clear when you're actually applying to Business School. Have you already applied? From what you've described, your GPA and your GMAT are below what the School requires. If the next application deadline isn't until August, then you have plenty of time to study.
3) Was the Q35 that you scored on the GMAT the highest that you have ever scored?
The entire GMAT is a predictable, standardized Test, so you CAN train to score at a higher level.
GMAT assassins aren't born, they're made,
Rich