Hello Pankaj,

Unfortunately your rank is not sufficient to get admission in any IIT in mathematics, as the last cutoff for mathematics is 523, you need to get between 200- 480 rank so that you can get admission in any IIT in mathematics.

IIT Hyderabad,IIT ROPAR, IIT indore are three College where you can get admission easily if you get rank below 400.

I hope it helps.

Best of luck