M.Sc

Deeply clarify what actually you want to make your career. If it's maths, go for M.Tech. It's a higher qualification than any M.Sc. It gives easy placement and better job prospects.

As per UGC guidelines, you can not do two degrees simultaneously from same or different universities.

It will be a real challenge. You need to contact some universities first, take WES evaluation. Some universities will hesitate to accept three year degree, but few will. A lot of groundwork and research must be done by you. Contact the universities.

Go for M.Sc Maths, you can do B.Ed after M.Sc.

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The entrance exam for most of the programmes will be conducted in June, 2019. The courses which are offered through Pune University entrance test 2019 are M.Sc. Biotechnology, M.A. etc.

First of all, if you have completed your graduation in computer science as a mandatory subject in all three years then you are eligible for M.Sc. You can prepare for the entrance exam by studying operating system, data structure in C, data communication and computer network, database management system, digital computer and concept of a graph, tree, c language operator, stack and queue. Go on BHU official website and download the last five year PET computer science entrance test paper and prepare according to with the question alternativity.
Thank you.

Visit on this link.
https://www.shiksha.com/university/manipal-university-manipal-academy-of-higher-education/met-exam