Dear student Mr. JJ
Yes, you are correct that there is not any pridiction of cutoff for IITJEE -2010.
This will depend on IIT which are organized this. only difficulty level will fix this cutoff.
But in general you can assume 10% will be the cutoff in each subject in IITJEE for general catagory.
Please feel free to post as many doubts on our discussion forum as you can.
If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
We are all IITians and here to help you in your IIT JEE & AIEEE preparation.
All the best.