Dear Aspirant,

The top colleges in Delhi NCR except Delhi University for B.Sc maths are:-

• St Stephen's College, New Delhi.
• Hindu College, New Delhi.
• GD Goenka University, Gurgaon.
• KR Mangalam University, Gurgaon.
• Miranda House,New Delhi.

For more information on colleges in Delhi NCR check this link:- https://university.careers360.com/colleges/list-of-bsc(hons)-in-mathematics-degree-colleges-in-delhi

Hope this helps.

Good luck!