There is a good amount of scope after Bsc Mathematics. You can make your career in the field of research like a Mathematician and a teacher as well. Check institutes like TIFR Mumbai, IMSc Chennai, Harish Chandra Research Institute Allahabad.

You can even work as a Math Teacher, Math Professor, Statistician, Accountant, Computer Programmer, Economist in various governmental as well as private organizations such as schools, colleges, universities, banks, investment firms, insurance agencies, engineering firms, technical journals, utility companies, research & development firms and so on.

Research can be data based, qualitative research and even of certain findingd.

It depends on the type of research you are interested in.