INMO: Indian National Mathematics Olympiad


INMO is a high school mathematics competition held annually in India since 1989, conducted by Homi Bhabha Centre for Science Education (HBCSE) under the National Board of Higher Mathematics. INMO is the third stage of Mathematics Olympiads after RMO and PRMO.
Visit for more information.


The questions are mostly from 8th, 9th, 10th. 11th and 12th class. Some of the topics are-

  • Arithmetic of integers
  • Quadratic Expressions
  • Trigonometry
  • Geometry
  • System of linear equation
  • Coordinate geometry
  • Factorization and polynomials
  • Elementary combinatorics
  • Inequalities
  • Finite series and complex numbers
  • Elementary graph theory

Preparation tips-

The difficulty level increases from PRMO to RMO to INMO to IMO.

Build your mathematical aptitude-

You need to have a very analytical thinking and need to improve your logical thinking abilities.

Focus on NCERT-

It will help you to brush up your basics. Solve all the problems of NCERT. Try to derive proofs of your own. It will help you to approach different questions with some ease.

Refer different books-

You need to solve many questions from different books in order to excel this exam as the Olympiads contain advanced level questions and problems. Preparing from advanced level books will certainly give you an edge and acquaint you with higher-order thinking skills

Solve previous year papers-

Previous year papers are key to success in this exam. By solving them you can identify your strengths and weaknesses and can work on them.


There is nothing to memorize in Mathematics. All you have to do is practice. Solve advanced level mathematical problems as many as possible.

0 0 votes
Article Rating
Notify of
Inline Feedbacks
View all comments
Anirudh Gupta
IIT Delhi Computer Science CBSE Class 12 - 94.2% RMO Awardee
Subscribe weekly news
Would love your thoughts, please comment.x

Book a counselling session now