B.Sc Mathematics

Here are the combinations:
Maths + physics + chemistry
Maths + Defense studies + physics
Maths + chemistry + computer science
Maths + physics + geography
Maths + geography + chemistry

Yes, you are eligible for M.Sc. Many universities offer this course. One of the finest universities of India, Delhi University, also offers this course. Admission for this course is based on the entrance exam. IIT also offers the post graduation programme M.Sc Maths. So be prepared for the entrance exam. But some colleges also offer this course on the basis of your marks in B.Sc Maths.

Eligibility for M.Sc in Astronomy:
*The minimum eligibility required to be met for admission to the course is B.Sc or an equivalent degree with a minimum aggregate score of 50%.
*A few universities and colleges in India conduct entrance examinations for admission to the course.
Good luck.

Admission is done through counselling based on the marks obtained in the entrance test conducted by the Maharshi Dayanand University, it's not based on merit.
For more details, check the link below:
https://www.shiksha.com/science/course/integrated-b-sc-hons-m-sc-hons-in-mathematics-maharshi-dayanand-university-rohtak-270937

You can consider following colleges:
Brahmananda Keshab Chandra College - BKC
Jadavpur University
Jayasree Academy
JIS University
Lady Brabourne College
Netaji Subhas Open University
Techno India University
Vision Institute of Professional Study - VIPS

Hi Ayesha,
The cut-off keeps changing every year and with every stream. Over the last few years it has remained within the range of 70 to 78%. Keeping this in view you will have a chance of admission. If the cut-off increases drastically chances will be minimal.

This would depend a lot on you and your career aspirations. If you intend to pursue research /academics as a career then M.Sc is the answer and if you want to move into general management area then MBA should be preferred.

Yes you will be getting a seat !!,actually nizam college is capable for bsc(maths , electronics,and physics).And your percentage is also good .

No, need of clearing any exam. Direct admission in the campus is possible if you have scored good marks in HSC.