Yes sir, i understand your query as its also possible to get admission in msc mathematics as follows:

BITSAT 2018 cut off is the qualifying marks which must be scored by candidates to participate in admission rounds. The cut off scores vary from year to year. Here is the branch-wise cutoff for all BITS campuses for your reference:

1. Presidency College, Kolkata.
2. St Stephens College, Delhi.
3. Christ College, Bangalore.
4. St Xavier's College, Kolkata.
5. Madras Christian College (MCC), Chennai.
6. Fergusson College, Pune.
7. St Stephens College, Delhi.
8. St Xavier's College, Mumbai.