See, if you want to take admission in Rajasthan University to pursue a course in B.Sc (Honours) in Mathematics, then according to the cut-offs of previous years, the marks required are:

GEN: 94.75%
EWS: 94.5%
OBC: 91.5%
SC: 83%
ST: 75%

So, if you belong to the OBC, SC or ST category, then you can definitely get an admission into your desired course! Other courses that you can get are BSc(H) Physics, Chemistry and Life Sciences.

All the best!