How non -standard problems solve. 15th edition, stereotypical. Kanel-Belov A.Ya.

The book describes a number of classic ideas for solving olympiad problems, which are non -standard for most schoolchildren. Each idea is equipped with a comment, examples of solving problems and problems for independent solution. The collections of the tasks of the Olympiad and research types (total 200 tasks) are given, which are grouped by classes.

The collection is addressed to high school students, teachers, leaders of circles and all fans of mathematics.