I would suggest just solving the OG orange guide and green quant supplement. If you have already gone through these two books. Go back and solve all of the problems again. Pay attention to what you are doing, your equations, etc. Also, pay attention to what the book is doing - how are the equations set up, what geometry concepts are used, etc. It is better to really get the problem type down and strong rather than simply solve as many problems as possible.

HI Vik i have OG quant review with me it has 170 proble solving questions and around 120 data sufficiency questions. , is it the same quant book from which u studied, i jst wrote the taste 2 days back so i realy want to improve in quant within 30 days please help me , and if the quant book is differen thhen how much does it cost, please reply ASAP, is range green different from one which i have already got