Hello aspirant....
Following are the eligibility criteria to appear inMET:
Age Limit:There is no minimum age to apply.

For B.Tech:

Qualifying Exam:Candidate should pass the 12th class examination from a recognized board.

Subjects:Applying candidate should have Mathematics, Physics and English as a mandatory subject along with Chemistry, Biology, Biotechnology or any technical vocational subject.

Minimum Marks:50% marks taken together in Physics, Mathematics and any one of the optional subject
Hope it helps you.
Best of luck.