JEE Advanced maximum arks are not defined :

Maximum Marks vary every year like below:

2017- 366

2016- 372

2015 - 504

2014 - 360

So, it is difficult to predict marks as exam pattern and marks change every year but you should score more than 45-50% marks to get good branch in Top IITs.

You can check the cut off rank from the given below link

JEE Advanced IIT Hyderabad Cut Off 

Good Luck!!