M. : ICNMO, 2013. 197 s. The conditions and solutions of the Tournament tasks with detailed commentaries (mathematics, physics, chemistry, astronomy and earth sciences, biology, history, linguistics, literature, mathematical games) are given . The authors tried to write not just a collection of problems and solutions, but an interesting scientific and public brochure for a wide range of readers. A significant part of the material is presented at the level available for schoolchildren of the 7th grade . For participants of the Tournament, schoolchildren, teachers, parents, heads of school circles, organizers of the Olympiads .