Maya, Admission to IITs is through JEE Advanced. And cut offs change every year.  JEE Mains is the entrance examination for admission to IIITs, CFTIs and NITs along with State run Government and Private Engineering Colleges. Cut offs change every year and are dependant on various factors like no.of Candidates who appeared for the exam, no.of Candidates who qualified, difficulty of the exam, Category and the no.of available seats. Please read our article for previous years cut offs of JEE Advanced: https://engineering.careers360.com/articles/jee-advanced-cutoff