Preparing for competitive exams is an complex process. Remember IIT JEE is an strategy exam and NOT an IQ test. JEE does not test your intelligence or knowledge or application of knowledge. It tests all in one go. The most important thing JEE tests is your mental strength (Not IQ). Will come back to that later. You must start from the basics : Start with NCERT, a very good but difficult to comprehend basic book. NCERT is the perfect book to make very good scholars but not ver