How to start preparing for IMO?
Know the competition level in your own country
learn proof writing
Solve problems
learn theory
Practice exam taking
Number Theory
- Number Theory by Naoki Sato
- Number theory by Titu Andreescu and Dorin Andrica
- Elementary Number theory by David M. Burton
- 250 problems in elimentary number theory by waclaw sirpenski
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Geometry
- Euclidean Geometry in Mathematical Olympiad by Evan chen
- A Beautiful journey through Olympiad Geometry by Stefan Lozanovski 3. Yufei zhao Articles
- 103 Trigonometry problems by Titu Andreescu
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Algebra
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