The minimum eligibility for BSc maths is a pass degree in 10+2 or equivalent examination in Science stream with at least 50% marks obtained by candidates in Mathematics subject or in aggregate from a recognized board or Institute, and

The minimum eligibility for BSc Physics is 10+2 from PCM/PCB ( Physics , Mathematics, Chemistry, or Biology)  from a recognized board.

If you don't have these subjects, then you won't be able to go graduation in maths or physics.

I hope this helps you.