Hi aishwarya17,
If you're looking for explanations/Tactics/shortcuts for individual GMAT questions, then you might want to "Google" the question(s) that you're interested in. Chances are good that those prompts have already been discussed in the forums here. If you have individual PS or DS questions that you want to discuss, then you can post them in the respective Quant sub-forums here:
https://gmatclub.com/forum/quantitative-7/Beyond that, if you'd like to discuss how to improve your GMAT Scores or put together a Study Plan, then 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?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich