Ans: INMO is the third stage in the National Olympiad Math program and the students who qualify for the first two stages are eligible to write the INMO examination. Asking if the INMO examination is tough would be an understatement as the stakes are very high. The INMO 2021 exam is a four-hour written test with six very difficult questions and descriptive nature of the INMO question paper. The INMO 2021 syllabus is entirely made up of pre-degree college mathematics. INMO 2021 has a syllabus for classes XI and XII that is grouped together with a high degree of complexity and sophistication.