Maths Spl

Level of Maths in the NATA exam is moderate and the syllabus is generally of metric level.

No, paper is same for both maths and non-maths candidate.

Rajmas or Hansraj. You need to clear the exam for M.Sc. There is no cut-off for that.

It's difficult for you to take admission in DU with this percentile as the cut-offs are very high but you can still try when the cut off comes.

I am from ISC board but as far as I know, you can score good marks if you study NCERT.

Yes, you can get admission in MCA without Math in class 12th, because you have completed BCA, so don't worry you can apply.

The undergraduate course focuses on developing mathematical skills in algebra, calculus, and data analysis. Students who are interested in pure Math and are interested in interpreting data, finding patterns, and determining conclusions are good candidates for a B.Sc Mathematics degree.
Scope:
After your graduation from B.Sc Mathematics degree, you can pursue courses like MCA M.Sc. IT, actuarial sciences, MBA or M.Sc. In Mathematics.

The undergraduate course focuses on developing mathematical skills in algebra, calculus, and data analysis. Students who are interested in pure Math and are interested in interpreting data, finding patterns, and determining conclusions are good candidates for a B.Sc Mathematics degree.
Scope:
After your graduation from B.Sc Mathematics degree, you can pursue courses like MCA M.Sc. IT, actuarial sciences, MBA or M.Sc. In Mathematics.

I would suggest you to do Mechanical engineering, because you are good in both Maths and Physics.

I don't think so. You can pursue B.Sc, in any of it's branches, only if you belong to Science background.