: Divisibility, primes, modular arithmetic , and Diophantine equations.
If the problems in the 2000–2001 collection feel too advanced, bridge the gap with these highly recommended texts : Mathematical Olympiads 2000-2001: Problems and ...
: Specifically highlights problems from countries that traditionally perform well at the IMO, offering a diverse range of difficulty and style. Preparation Guide: How to Use the Material : Divisibility, primes, modular arithmetic , and Diophantine
