To secure the 90 percentile, you need a score of around 75–80 marks out of 300, which is not difficult. n Chemistry: Read some of the introductory chapters from NCERT, especially Inorganic Chemistry( No matter how much you hate it). Chapters like Atomic Structure, Chemical Bonding, s Block, States of Matter n Periodic Properties, Coordination Chemistry, Chemical Kinetics, Solid State, Surface Chemistry, etc., can be easily covered in a month. Also, Stay away from Thermodynamics and p- Block; they will demand a lot of time. n Physics: Select the chapters which are only formula based, like Waves, Modern Physics, Electric Current, AC. You can score enough from them to reach the 90 percentile. STAY AWAY from Rotation, COM, EMI, and other conceptually heavy topics. n Mathematics: Focus on Coordinate Geometry and Vector 3-D, Sequences and Series, Quadratic Equations, MOD. Please Stay away from Integration; It will disintegrate your preparation and confidence ( bad pun  ) n Complete the JEE Main Topics like Semiconductors, Mathematical Reasoning, and Environmental Chemistry. They are easy and sure to be asked in the paper. n