Books and Resources on Number Theory for RMO

Level 0

  • Mathematical Circle; Russian Experience  by Fomin
  • Mathematics can be fun by Perelman

Level 1

  1. Challenges and Thrills of Pre-College Mathematics by University Press
  2. Excursion in Mathematics by Bhaskaracharya Pratisthana
  3. Problem Solving Strategies by Arthur Engel

Level 2

  1. Elementary Number Theory by David Burton
  2. Problem Solving Strategies by Arthur Engel

Level 3

  1. Elementary Number Theory by Sierpinsky
  2. IMO Compendium