Living mathematics. Perelman Ya.

The book, which has been withstood both in our country and abroad, dozens of reprints and is still popular among young and adult readers who are passionate about entertaining mathematics-or only discovering it for themselves. Forget about the boring pages of textbooks. You will find witty and cunning tasks for ingenuity and fascinating puzzles, secrets of encrypted correspondence and amazing tricks with numbers, intricate tricks of mathematical gymnastics and even small stories with a mathematical secret. The great popularizer of science Yakov Isidorovich Perelman will help you understand: mathematics is entertaining and very, very fun!