This book is a collection of the most incredible puzzles and tasks that will make even the most educated and savvy reader think. You can spend a lot of pleasant minutes above its pages, understanding entertaining exercises for an inquisitive mind. Many of these tasks will cause a sincere smile, because to solve them you will need a good bit of a sense of humor, without which, however, the simplest puzzle cannot be solved. And assignments on proportionality and spatial imagination will teach you to approach any problem creatively - and later enjoy the grace of the right solution.