how can i get a tricks for quantitative

Hi Biswajit, to get good command in quant you need to have clear concepts.  You should know how to apply this concepts. Learn various important shortcuts that will help you save your time. Our blog has excellent post on Tips for preparing Quantitative Aptitude for CAT.

 I recommend you take cracku video series and study room which covers vast amount of questions asked in CAT.  

Good Luck