Best mathematical games, puzzles, and tricks

This publication included two famous books of the outstanding popularizer of the exact sciences of Yakov Isidorovich Perelman - “Focuses and Entertainment” and “Living Mathematics”. The author opens the secrets of phenomenal memory, teaches simple, but spectacular tricks, offers mathematical games, tasks, puzzles, secret ciphers. All tasks are provided with answers with a detailed analysis of solutions. To complete the tasks, it is not necessary to be a child prodigy - sufficiently basic school knowledge of mathematics, while logical and creative thinking, attention, calculation skills are developing, and a general horizons are expanding. And the unique flavor of the Soviet era, preserved in tasks, will cause interest not only in mathematics, but also in the history of the native country. The tasks of Jacob Perelman are an unlucking classic for all times!