If you want to take admission in IITs/NITs/IIITs and GFTIs you should have 75% marks in your board exam or you should be in top 20 percentile. Foe SC/ST it is 65% marks.

For DTU and NSIT you should have 60% aggregate marks in P/C/M. There is relaxation of marks for reserved category.

If you want to take admission in top private colleges you can check the eligibility criteria below

BITSAT- You should have secured at least 75% aggregate marks in the qualifying examination with Physics, Chemistry and Mathematics. Apart from the 75% aggregate marks, they should have scored 60% marks separately in each of the three subjects.

VITEEE- You should have secured 60% marks in Physics, Chemistry, Mathematics taken together in 10+2 or equivalent exam

MU OET- You should have scored 50% marks in Physics, Mathematics and any one of the optional subjects in 10+.

To check the complete information about the exam you can refer below link

https://engineering.careers360.com/exams

Good Luck!!