Hello Aspirant,

To get admission in iisc bangalore you need to get around 99.5 percentile to 100 percentile. So according to this percentile you would be requiring around 250 marks in jee mains for general category students.

For more information you can visit JEE MAIN 2021  college predictor

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

I hope this information helps you.

Good Luck!!