hi,

see Nits has decent placement records, so if you go for b.tech courses in any nits there is decent placement in On campus. however for north east nits location is remote , thus if you want to do Internship during the final year of studies you may have to relocate in metro cities. however since you are good at mathematics I would suggest you to go for computer science engineering course. however I would prefer IIIT jabalpur among others as per students review.

You may use Careers360 college predictor tool to know your predictable colleges

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer