Before you is the legendary book by Yakov Perelman "Live Mathematics", thanks to which many generations of children were taught love for this difficult but important subject. This book - an indispensable component of any children's library, because the author's gift - accessible and interesting to talk about complex things - has passed the test of time. It will certainly arouse interest in mathematical puzzles and problems even among those who have never been interested in mathematics, will learn to cope with complex equations, turning any task into a fascinating and lively narrative.
