As you have already done with your technical subjects, this is the time to prepare for the section which most GATE aspirants neglects and end up scoring very low score due to poor performance in GA Section. So here are the books, you can use for your preparation- 1. Quantitative Aptitude for Competitive Examinations. 2. The Pearson Guide to Quantitative Aptitude for Competitive Examinations. You can also follow the tips given below- - The General Aptitude section is easily one of the most scoring sections of the GATE exam so don't leave the GA preparation till the end. - Revise your English grammar from Class 10th books. - Increase your vocabulary on daily basis, this will help you to be prepared for the final exam. - Once a week, read a new short passage and try describing it in a few points. This will greatly help in Preparing for reading comprehension. - Try language puzzles and analogies off-and-on when you get time. - The Numerical Ability sections basically focuses on approximation skills. - Increase your speed in calculations and study basic concepts from Class 10. Good Luck!!!