Depending on the which ISI you chosen. If you choose ISI, kolkata then the official cut off in this year is 67/120 in  (UGA) and 30/80 in (UGB) in general category. In other category, this percentage is  10% or 20% lower of general category.But in case of interview there is no any  reservation category. In case of other ISI  then the cut off is higher then ISI, kolkata.