Masters

I think there will be no problem because you have already studied in Bangalore.You will be able to adjust.

You may apply for Masters in statistics and make your career as a statistician. Nowadays, maths students have opportunities in the computer industry too. They can combine their maths degree with a qualification / certification in the interested software field (CISCO, Oracle, etc.). One can get a handsome. Employment in the companies like TCS, Wipro, Tech Mahindra, etc. In the academic field, the option to pursue a M.Sc followed by a PhD and associated NET qualification and CSIR/JRF is also an option. You can also pursue an M.Sc in industrial mathematics.

No, you can't do masters directly after diploma. For doing masters you need to get a bachelor's degree first.

Hello Rakesh,India is the best, as far as IT is concerned. Of course, one can think of US or UK. From the perspective of settling abroad after studies, Canada / Australia & then NZ are the best.