Hello Rupesh, Greetings!

Let me help you,

After your B.Sc. Maths (Hons), you have many career options 

You can study M.Sc. in Math, MBA or MCA in a good college or university. You can appear JAM to take admission in IITs and NITs. You can try for TIFR and BARC if you are interested in research.
You can join professional courses like Photography,Fashion designing, Web designing, web developing, application developing, animation or vfx if you have a good creativity. You can prepare for CS if you are a smart worker having patience. If you have no patience, then don’t even try it.
You can join Banking sector by appearing IBPS and SBI exams. You have a great future and good salary in it.
For govt jobs you should prepare for SSC CHSL, CGL and CDS. You can also appear AFCAT.

Thank you, hope this helps.