Tasks, puzzles, riddles, tangrams in the mathematical universe of numbers and figures

Two elements dominate mathematics — numbers and figures with their infinite variety of properties and interconnections. The book includes two editions of the master of domestic popular science literature B. A. Kordemsky, "The Amazing World of Numbers" and "The Amazing Square." This is an expanded and updated modern reissue. The first part of the book contains more than 200 tasks, puzzles, charades, and riddles. The second part offers puzzle tasks to create various figures from parts of a square. At the end of the book, answers and detailed solutions to all tasks are provided. This book is for everyone who is interested in mathematics, regardless of age. It aims to penetrate the amazing world of numbers and figures with the mind, to uncover its wealth, and to stimulate mathematical curiosity and personal initiative.