Hello,

First of all I would like to tell you that the format of the Board Examination and JEE Entrance Examination are completely different, hence one can't say if a student scoring 90+ marks in board will be able to replicate it in the JEE Examination.

------- If your concepts and basics of Physics Chemistry and Maths are very strong then you shouldn't worry much and just practice as much as possible so that you excel in the main examination .

------ Also you must believe in yourself and your preparation for the examination. Don't think much about the result and just focus on giving your best.

------ JEE Mains and Advanced are one of the toughest Entrance Examination. Though it might be one of the toughest Entrance Examination but with hardwork and meticulous preparation it can be cracked.

- Now talking about preparatory ways for the examination.

------ Complete your Syllabus with complete understanding of all the concepts as soon as possible.

------- Ensure you practice as many questions as possible, it will help you in understanding mistakes and developing new concept.

------- Also it is must you give time to time mock test to see your level of preparation.

------- Clear all your doubts with the teachers or friend regarding a difficult concept. This will be helpful in developing a better understanding of that particular concept.

I hope you find the answer helpful.

Thank you.