A Collection of Mathematical Puzzles
1. Quickly Identifying the Fake Coin
Given n coins with one counterfeit that differs in weight from the genuine coins, how can you use a balance scale to quickly find the fake coin?
2. Puzzle Games
How to cut a square into n pieces and then rearrange them into another shape.
3. Number Magic
Have someone think of any number, then through a series of calculations, be able to deduce the exact number they thought of.
4. Summation of Consecutive Numbers
Adding numbers from 1 to 100 is a classic example, yet surprisingly many people are unaware of the method.
5. Logical Reasoning
A group game suitable for several players, where some always tell the truth and others always lie. How can you quickly identify the liars?
The above mathematical puzzles come from the book The Moscow Puzzles: 359 Mathematical Recreations, known in Chinese as 《莫斯科智力游戏》. The book features 354 more puzzles similar to the ones above, covering numbers, logic, matchstick puzzles, geometry, and other types—each with thoroughly detailed solutions. This is a collection of brilliantly diverse brainteasers! The Moscow Puzzles is acclaimed as the most outstanding puzzle collection in the history of Russian mathematics. It not only sharpens your problem-solving skills but also offers an entertaining and enjoyable experience!

It is no exaggeration to say this is the finest and most popular puzzle book published in the Soviet Union. Since its first publication in 1956, it has gone through eight editions and been translated into English, French, Romanian, Korean, and Chinese. The Russian edition alone has sold nearly one million copies.
Part of the book’s success comes from its wide variety of brainteasers, ranging from simple “riddles” to more complex challenges—all without requiring advanced mathematical knowledge. Many puzzles are entirely new to Western readers, while familiar ones are presented in fresh formats. Often framed within captivating stories, the puzzles offer non-Russian readers insight into contemporary Russian life and customs. Moreover, Martin Gardner, former editor of the Scientific American Mathematics Games column, edited and simplified the book to make it more accessible and enjoyable for English readers, while preserving the original’s freshness, warmth, and humor.

The book contains over 400 clear diagrams and illustrations, making it an essential collection for puzzle enthusiasts and casual mathematics fans alike.
The author, Boris A. Kordemsky, was a mathematics teacher dedicated to popularizing and educating others about mathematics. He wrote over 70 mathematical books during his lifetime. Published in 1956, this book compiles numerous brainteasers and remains the best-selling and most beloved puzzle book in Soviet history.
Through engaging stories, the book also provides non-Russian readers with a glimpse into Russian traditions and culture. The Moscow Puzzles serves as a window into the world of Russia.
Challenge yourself with 359 mathematical puzzles and ignite your passion for problem-solving! From simple riddles to highly challenging puzzles, you will enjoy thought-provoking entertainment and a sense of accomplishment. Each puzzle includes diagrams or sketches to aid understanding. With over 400 illustrations, the book offers a rich visual experience!