Fascinating arithmetic

The famous Soviet mathematician, journalist and teacher Yakov Perelman convincingly proved that studying the exact sciences can be an incredibly exciting and exciting thing. Dry, at first glance, numbers and boring calculations are hung up in many interesting secrets and discoveries. This publication is an original text, released in 1938 by the editorship of popular science and youth literature.
What kind of mysterious signs were scared by the inhabitants of Petrograd in 1917? How can you denote numbers instead of numbers? How can you use a cup, spoon and fork in arithmetic? What confused the hero of the story A.P. Chekhov? What is a "knot for memory"? Why is the number 12 remarkable? What is the secret of the number of Slaherazada? What is needed to perform an arithmetic focus? How to read thoughts on matches? Is it possible to guess the date of birth of a person?
The book is intended for a wide reader audience, and will be equally interesting and useful, both to schoolchildren and students, and adults for intellectual leisure