Hey !

For getting admission in BSc mathematics hons the eligibility criteria is for B.Sc. Math Honours degree course is a pass  in 10+2 or equivalent examination from Science stream with at least 50% marks obtained by candidates in Mathematics subject or in aggregate from a recognized board or Institute and admission process is based on merit or entrance exam.

So yes you are eligible for BSc mathematics hons and take admission in Ravenshaw University because admission process in Ravenshaw University is merit based. If you need more information you can visit here.

https://www.careers360.com/university/ravenshaw-university-cuttack/bsc-mathematics-hons-course

I hope this information might be helpful for you,

All The Best !!!