As you said that your interested in the field of Mathematics, then I would suggest you two different streams at Intermediate, they are:
MPC: Mathematics, Physics and Chemistry
MEC: Mathematics, Economics and Commerce.
Firstly, if you choose MPC you need to have good Physical science background on par with Mathematics. In MEC you need to be sound in Social along with Mathematics.
Secondly, the ultimate goal of any person is to settle in life with good position to the earliest. So if you take MPC the best thing that you can do after Intermediate is B.Tech which is a four year course. If you have chosen MEC you can do B.Com and after that you can opt for CA. This was the case till last year.
The scenario has changed from this year, a student from MPC background is also eligible for CA. So MPC is better than MEC as it has two scopes of doing graduation.
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