Hey Reena,

Hope you are doing great,

Yes, you can apply for teacher job if you have completed your MSc in Mathematics. Requirements are depends upon the school to school, some of the schools may also required B-ed and M-ed for higher post. If you want to do job in college then you should do Phd. These are the things which you should keep in mind.

I hope this will help you,

Best of Luck :)