Tasks of the Saint Petersburg Olympiad for schoolchildren in mathematics 2009

The book is designed for schoolchildren, teachers, teachers of mathematical circles and just mathematics lovers. The reader will find in it the tasks of the St. Petersburg Olympiad of Schoolchildren in Mathematics of 2009, as well as the Open Olympiad of FML, which, not being a tour of the St. Petersburg Olympiad, by the nature of the tasks, the composition of the participants and the place of conduct is an excellent addition to it. All tasks are given with detailed solutions, conditions and solutions of geometric tasks are accompanied by drawings. As an additional material, the reader will find the task with the XX-year-old Conference of the City Tournament and the article on the Erdesh Theorem associated with this task, as well as an overview of the results on the problem of associates