Good evening ,

I hope you are fine and doing well. As per your mentioned query , i would like to tell you that no you cannot get admission in IIT through your Olympiad score. As per the jee mains eligibility criteria you have to be appear for the jee mains exam. As jee mains is a national level of exam and for getting admission in IIT thousands of students compete with each other. And also if a student has decimal point variation to get the admission still he cannot get the admission.

I hope this will be helpful for you.

All the best !!