Colleges in Tamil Nadu

Yes, with this percentile you will definitely get seat in SASTRA University.
Best of luck.

By considering the previous seat allotment statistics, it's a little bit difficult to get CSE in NIT, Trichy but you can get the branches like, IT, Mechanical, EEE. Anyway, try for it.

Yes, you may get admission in SASTRA.
According to your JEE Mains percentile, there may be chances of getting a seat in the SASTRA University.

You should have scored a minimum of 50% marks in mathematics to join B.Sc in Maths.

Hello, you have very good percentile at above 80, as well as a good CGPA of 9.88 in your boards. 70% of the seats in this Deemed to be university are filled up according to the ranking in JEE Mains along with weightage for your marks obtained in the board & remaining 30% seats are filled up based on

For UG courses, the application starts from May 18, 2019, and for Master's, June 14, 2019.