Hi riteshpatnaik,
In one of your prior posts, you listed a Q34 as your most recent Quant Scaled Score on a CAT and a Q49 as your goal. If that Q34 is accurate, then you have a lot of work to do in the Quant section - both in honing your general 'math' skills/knowledge AND in building up your Tactical knowledge, pattern-matching skills, etc. Based on some of the other CAT scores that you're reported, it's possible that the Q34 just occurred on a 'bad day.' If you have less than a month before your Official GMAT, then that might not be enough time for you to raise your score 130 points. If you are going to stick to that schedule though, then you're going to have to be efficient with your studies.
When it comes to studying for the GMAT, there are a variety of different options - but there's a practical way to decide which materials are 'best' for you. Most GMAT Companies offer some type of free materials (practice problems, Trial Accounts, videos, etc.) that you can use to 'test out' a product before you buy it. We have a variety of those resources at our website (
www.empowergmat.com). I suggest that you take advantage of all of them then choose the one that best matches your personality, timeline and budget.
If you have any additional question, then just let me know.
GMAT assassins aren't born, they're made,
Rich