Quick Calculations. Calculations, Problems, Puzzles

The collection “Quick Calculations. Calculations, Problems, Puzzles” invites you on an exciting journey into the world of numbers and mathematical riddles with Yakov Perelman. The famous Soviet mathematician and popularizer of the exact sciences shares the main methods and rules... for performing simple calculations in your mind in the book “Quick Calculations. Thirty Simple Techniques for Mental Arithmetic.” The mathematical riddle “Think of a Number” will teach you how to astonishingly guess the numbers you have in mind. The collected problems from magazines of different years, as well as a collection of numerical puzzles and arithmetic tasks, will help consolidate theoretical skills in practice, stimulate imagination, and critical thinking. By combining theoretical knowledge with practical exercises, Y. Perelman creates the perfect balance between learning and entertainment. Regardless of age and level of preparation, readers will be able to discover the world of numbers from a new perspective.