Hey,

Indian Statistical Institute has one of the cut throat competition in the nation and thus the entrance exam is quite tricky. The official site of the ISI has a set of previous year papers and sample papers which will give you an idea as to how and which types of questions are asked in the exam.

You can visit this link below and select your course to get sample papers:

https://www.isical.ac.in/~admission/Syllabus-And-QP.html

I hope this helps.

All the best!