Hello aspirant ,

To get admission in IITs...you have to qualify both JEE mains and jee Advanced exam with a very good score and rank.....

The syllabus of JEE exam is Very vast.....

Eligibility criteria for IITs :

• Minimum 75% aggregate marks should have been secured in 12th standard (or equivalent) examination. For the SC/ST/PwD category, the aggregate marks is minimum 65%

Or

• The candidates should be within the top 20 category percentile of the qualifying examination.
• If a candidate has passed 12th standard (or equivalent) examination in 2020 and wishes to improve his/her aggregate marks to satisfy the criterion of 75% aggregate marks (65% for SC/ST/PwD), then he/she can reappear for any number of subjects for improvement. The percentage marks in this situation will be calculated by considering the marks obtained in 2020 or 2021, whichever is higher, in the respective subjects, in his/her two attempts in 2020 and 2021.

For efficient preparation, consistent revision is necessary.......you have to revise important points or notes before starting a new chapter....

The level of questions is a bit higher in jee Advanced than mains....

The syllabus is almost same for both (mains and advanced) exams....

It can be only achieved by serious dedicated practice and questions solving.....

From the following link.....you will get all the needed information about your query and cut off ranks to get admission in IITs......

https://engineering.careers360.com/articles/jee-advanced-eligibility-criteria

Also, You will get a complete syllabus of JEE exam through the following link......

https://engineering.careers360.com/articles/jee-main-syllabus

Moreover ,You will find all the needed information about reference books through the following link for jee mains and advanced exam preparation.....

https://engineering.careers360.com/articles/best-books-for-jee-advance

Hope this helps

All the best for your Future