Hi there,

Some of best bsc mathematics hons college are following:

JMI New delhi

MSU Baroda

LPU jalandhar

Jadavpur University, kolkata

BHU varansi

AMU aligarh

Manipal University

Ravenshaw University

MSRUAS Bangalore

Visva bharati University

For more details follow this link: https://university.careers360.com/colleges/list-of-bsc(hons)-in-mathematics-universities-in-india

Hope it helps you

Good luck!