Best colleges in India for B.Sc Mathematics are :-

University of Engineering and Management, [UEM] Jaipur

Loyola College, Chennai

Stella Maris College, Chennai

Women's Christian College, [WCC] Nagercoil

St. Xavier's College, Ahmedabad

Ethiraj College for Women, Chennai

Isabella Thoburn College, [ITC] Lucknow

Vimala College, Thrissur

Maharani Lakshmi Ammanni College for Women, [MLACW] Bangalore

Bishop Heber College, [BHC] Tiruchirappalli

Sri Ramakrishna College of Arts and Science, [SR-CAS] Coimbatore

MG Science Institute, [MGSI] Ahmedabad

Hello Akashdeep

The best university to study best for Bsc mathematics is Delhi University.

1. St Stephen's College
2. The Hindu college
3. Kirori mal college.
4. Ramjas college.
5. Hans raj College.
6. Shri Venkateswara College
7. Dyal singh college
8. Shri tegh bahadur khalsa College.

These colleges are from DU are top most colleges for bsc in mathematics.

I hope it helps.