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I want to prepare for the maths olympiad and I was wondering if you can recommend me some books about combinatorics, number theory and geometry at a beginner and intermediate level. I would appreciate your help.

Bill Dubuque
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5 Answers5

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Problem-solving strategies by Arthur Engel is a pretty advanced general Olympiad theory book. A .pdf can be found here and a paperback can be purchased on amazon.

Ilikemath
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Ant
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If you're looking for a good Geometry book, you can check out Evan Chen's book, Euclidean Geometry In Mathematical Olympiads. There are no prerequisites to the book; all you need to do is know how to read proofs. A PDF of the book is $28:

http://www.maa.org/press/ebooks/euclidean-geometry-in-mathematical-olympiads

As a sample, here's a free PDF of chapter 2:

http://www.maa.org/sites/default/files/pdf/ebooks/pdf/EGMO_chapter2.pdf

  • Unfortunately the MAA webpages seem to have disappeared so here is the updated link: https://web.evanchen.cc/geombook.html – Ilikemath Nov 11 '24 at 21:10
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One of my favorite mathematical olympiad books is this one: https://www.amazon.es/Mathematical-Olympiad-Challenges-Titu-Andreescu/dp/0817645284 by Andreescu and Gelca. It's more on the itermediate level. It is sort of a compilation on useful techniques with sample problems. I suggest you give it a go.

Sak
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Some of my personal favorites for each category. Where I have attached no link you can easily find them online and for books by Andreescu generally on amazon.

Combinatorics

  1. A Path to Combinatorics for Undergraduates - Titu Andreescu, Zuming Feng
  2. Olympiad Combinatorics - Pranav A. Sriram (free pdf)

Number Theory

  1. Number Theory Structures, Examples, and Problems - Titu Andreescu, Dorin Andrica
  2. Modern Olympiad Number Theory - Aditya Khurmi (free pdf)

Geometry

  1. Euclidean Geometry In Mathematical Olympiads - Even Chen
  2. 103 Trigonometry Problems - Titu Andreescu, Zuming Feng
Ilikemath
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