Hi,
Admission depends on various factors. First of all you haven't mentioned which college or university you wish to join to study B.sc maths hons. The admission procedure varies from university to university.
Some universities conduct entrance exam for admissions and others just see your marks in +2.
Also, there is reservation factor that determines admission into various courses.
Your scores are great. You can use this link to see which colleges you can expect as per your marks, category, etc. and pursue B.sc maths hons. : https://dqxeclau.top/college-predictor
Hope this helps, good luck!