Hi Aspirant

Let me clear you that there is no B.tech course at IISc bangalore but there are few papers in B.sc at bachelor level.

 IISc bangalore takes admission on the basis of JEE main ,JEE advance ,KVPY and NEET UG.The cut off would be more than 95%ile.

This is just an approximation before the official announcement of the result which will take place after JEE in april.

You need to wait for it.

Hope this helps

All the best.