You haven't mentioned for which course are you enquiring about admissions to IIT. JEE Advanced is the entrance exam for admission to B.Tech and GATE is the entrance exam for M.Tech. But as GATE exam has already been done with, assuming you are enquiring about JEE Advanced, here is the link where you can diwnload previous question papers: https://engineering.careers360.com/articles/jee-advanced-question-papers. But if it is not for JEE Advanced, please do let us know and we shall help you with relevant information.