As the competition is concerned there is no fixed cut-off for entrance. It all depends on how many well prepared candidates appeared for the exam, question paper and if you are internal or external. All these conditions, added with the waiting list which gets cleared with the final admission decides the cut off.
The university does not release any cutoff. You need to score as better as possible. It will be wrong to say that this year, the cutoff is 80 or 70 or 65 etc. .If you score is 80/150( for external student) you name will be there in the selection list , and for internal students 70/150 is sufficient to get admitted to the university. This data is subject to changes.
The key to score well is Mathematics. Physics and Chemistry are of NCERT level. So focus on Maths. Maintain speed and accuracy. And the difficulty lies in the fact that you have to go through 150 questions unlike your JEE Mains in which you have to go through 90 questions.
Hope this helps you. Feel free to ask more questions.
Have a good day!!