99+ CAT percentile 5 times in row, 8+ years of experience, taught 6000+ students, 99+ percentile in MENSA IQ
For basics, you need to review any 9th and 10th standard ICSE/ CBSE books which will cover major parts of arithmetic, algebra, and geometry and mensuration. Also refer to 11th and 12th standard ISC/ CBSE books for concepts on functions, coordinate geometry (straight lines), trigonometry (basics) and permutation combination probability. However, knowing only the basics will not help. You need to know the methods used to solve a question inside 2 mins, since that is, on an average, the time available to solve a question. For reasoning and data interpretation, you need to put in lots of practice. Also, for the verbal section, knowledge of grammar is important, along with the ability to critically read passages for reading comprehension and other type of questions.