Hello dear..Once you are graduate, plenty of options will be available for you. But you have to keep your eyes and ears open. Maths graduate are mostly attached in Accountancy, Business and Computer Programming fields.You can apply for IBPS, Railway exam, UPSC,SSC, Public Service Commission, If you want to study further you can choose for part-time teaching jobs or can take tuition. You can even try for online Maths tuition. You can  also register in cuemaths and earn money. 

But it's advisable to gain higher studies for more bright future.

All the best.

Good Luck