The reader will definitely not get bored with the "Big Book of Puzzles, tasks and tricks" by Yakov Perelman: the most interesting games, riddles, puzzles, tricks, tasks, entertaining drawings and visual deceptions are collected here. Many of the provided mathematical problems are included in the programs of the school Olympic Games and do not lose their relevance to this day. This book will help you develop a good memory and quick mental counting skills, teach you how to encrypt messages, put shapes out of paper, make word chains, play naval combat and math games.For middle school age.