Dear aspirant

If you want to pursue Mathematics after your graduation then go for PHD in Mathematics. For this your Maths should be strong and you should have interest in it. And PHD program is having 5 years  of duration.

All the best.

Greetings!

If you want to study mathematics you can study MSc mathematics,

MSc Mathematics is a postgraduate which is being offered by various colleges and institutes. It is a two-year program and several institutes offer distance mode of learning. The duration of the distance program is a minimum of 2 years and a maximum of 4 years. Indira Gandhi National Open University is one of the most famous institutes in India which offers this program. They offer MSc in Mathematics with Applications in Computer Science (MACS).

The fees of this program are 27k and age no bar.

Colleges providing MSc mathematics:

• TIFR (Tata institute of fundamental research)
• IMSc(Institute of mathematical sciences)
• University of Hyderabad.
• CMI (Chennai Mathematical institute)
• ISI (Indian statistical institute)
• IISc (Indian institute of sciences)
• University of Calcutta.
• St. Stephen's College.

For more information visit: https://university.careers360.com/colleges/list-of-msc-in-mathematics-universities-in-india

I hope this was helpful. Thank you!