hi,

see cutoff score changes every year and it depends on some of the  major determining factors like number of applicants, questions difficulty level, seat matrix, students category and so on. iiser admission to bs ms course would be done through any of the following process:

(1) Kishore Vaigyanik Protsahan Yojana (KVPY) channel

(2) Joint Entrance Examination (JEE-Advanced) of the Indian Institutes of Technology

(3) State and Central Boards Channel (SCB)

http://www.iiseradmission.in/eligibility.html

however based on jee main score you may appear on jee advance exam , apply for iisc bangalore  bs ms course, integrated b.tech courses as well.

see selection for bs ms course in iisc bangalore is based on jee main score or jee advance or scb channel or kvpy score with considering your 12th score. however right now it is really difficult to predict exam score or college name just based on jee main percentile score.

To know about complete list of probable college name, based on your score, category please use Careers360 college predictor tool,

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer