Number theory is an important research field of mathematics. In mathematical competitions, problems of elementary number theory occur frequently. These problems

Number theory is an important research field of mathematics. In mathematical competitions, problems of elementary number theory occur frequently. These problems

Annotation. This text provides basic knowledge on how to solve combinatorial problems in mathematical competitions, and also introduces important solutions to c

The book provides a self-contained introduction to classical Number Theory. All the proofs of the individual theorems and the solutions of the exercises are bei

A collection of problems put together by coaches of the U.S. International Mathematical Olympiad Team.