Colleges in Ranchi

The eligibility criteria for M.Sc in Mathematics and Computing is:
Pass in Class 12th / equivalent examination with English, Physics, Chemistry, Mathematics and having at least 60% (50% for SC/ST/PwD) marks in average of 4 subjects - English, Physics, Chemistry, and Mathematics.
You would be eligible for admission if your date of birth falls on or after October 1, 1994 (for General) and October 1, 1989 (for SC, ST, and PWD). You may also refer this link for further information https://bitmesra.ac.in/UploadedDocuments/admadmission/files/IMSc 2019 - Eligibility criteria.pdf

Based on last year's ranking cut off, there is a good probability of you getting into Production Engineering, EEE, Civil Engineering, Chemical Engineering or Chemical Engineering (Plastics and Polymer), Mechanical Engineering or Biotechnology branches at BIT Mesra.
You may also try for other branches at our BIT Patna, BIT Deoghar and BIT Jaipur campuses.

Please mention your JEE Mains CRL rank and standard 12th percentage for us to be able to better address your query.

Here you can get complete information about Birsa Agriculture University, Ranchi:
https://www.shiksha.com/university/birsa-agricultural-university-Ranchi-22263

Top NITs come first then followed by BIT-Mesra. If you are eligible to get admission in any of the top NITs then go for it rather than BIT Mesra.

The course offered by BIT Mesra is M.Sc (Math and Computing) not B.Sc (Math and Computing), however, exit option is available after 3 years. Admission for M.Sc course is based on marks obtained by the candidates in Class 12th / equivalent qualifying examination. Hostel accommodation is available for all students in general. We will be happy to hear from you in case of any more queries. Please visit BIT Mesra website www.bitmesra.ac.in for more details.

I don't think it's possible then to contact the university for detailed information.

You need to apply through JOSAA.

Yes, it is. There are very good experienced faculty members. The students get placed very well.