Since you haven't mentioned what you are applying for, here is the complete list for the same accordingly:

1. STAT (HONS)/MATH (HONS):  12th or equivalent exam with Mathematics and English subjects
2. M.STAT: 3 years of bachelor degree/B.Tech/B.E with statistics subject
3. M.MATH: 3-year bachelor degree/B.Tech/BE with mathematics
4. M TECH (CS):  BE/B Tech or equivalent degree or Master’s degree in Mathematics/Statistics/Computer Science/Computer Application/Physics/Electronics Science/Information Technology.

Please refer to the link below for more information:

https://www.careers360.com/exams/isi-admission-test