Mathematics. Problems of the St. Petersburg school olympiad. 2022.

The book is intended for schoolchildren, teachers, instructors of mathematical circles, and just mathematics enthusiasts. The reader will find problems from the St. Petersburg schoolchildren's mathematics olympiad of 2022, as well as problems from the open olympiad FMO No. 239, which, although not being a round of the St. Petersburg olympiad, is a wonderful complement to it in terms of the nature of the problems, participants, and the venue. All problems are accompanied by detailed solutions, and the conditions and solutions of geometric problems are illustrated. As additional material, a selection of problems from the "Tuymaada-2022" olympiad is provided, as well as two articles and two fairy tales discussing the solutions to the problems published in this collection. Compiled by: Kokhas K.P., Rostovsky D.A., Khabrov A.I.