Hi there,

Hope you are doing fine.

To obtain a comprehensive collection of past year question papers for the ISI and CMI entrance exams you can find it by checking the official websites of both institutions, as they sometimes provide past papers or sample questions in their admissions sections.

Additionally you can explore the online forums and communities related to these exams that can be helpful as the students often share resources and discuss past questions. You can also visit coaching institutes specializing in preparation for these exams as they might also have a repository of PYQs that they provide to their students.

Also, educational websites and blogs dedicated to ISI and CMI entrance exams can be valuable sources for downloadable papers.

Hope this resolves your query.