The book "25000 lessons of mathematics" by Ryzhik B. and . is a unique manual that not only immerses the reader in the world of numbers and formulas, but also opens the door to a deep understanding of mathematical concepts. This work will be a real discovery for both schoolchildren and students, as well as for anyone who wants to refresh their knowledge or just love mathematics again. Author, B. and . Redhead, known for his deep and accessible explanations of complex mathematical topics. His writing style is clear and logical, which makes even the most confusing questions understandable. In this book, he offers readers not just a set of theoretical knowledge, but a whole system of lessons that covers all major aspects of mathematics - from arithmetic to higher mathematics. Each lesson is built in such a way that the reader can master the material step by step without feeling overloaded. The book “25000 lessons of mathematics” is intended for a wide audience . It will be useful for both students preparing for exams and students studying mathematics at a deeper level. It will also interest parents who want to help their children in their studies, and teachers looking for new approaches to explaining complex topics. Adults who have not experienced mathematics for a long time will find in this book an opportunity to refresh their knowledge and overcome the fear of the subject. The topics raised in the book cover a wide range: from the basics of arithmetic and algebra to more complex concepts such as analysis and geometry. Redhead not only explains the rules and formulas, but also shows how to put them into practice, making learning more fun and effective. The reader will be able to see how mathematics permeates everyday life, from financial calculations to scientific research. It is not just a textbook - it is a real encyclopedia of mathematical knowledge that inspires the study and application of mathematics in various fields. The book is also notable for its interactive approach. There are many examples and tasks that will help to consolidate the material passed .. Each lesson ends with self-checking questions, which allows the reader to assess their knowledge and understand which topics require additional attention. This approach makes the learning process more active and engaging. Ryzhik's style, his ability to explain complex things in simple language, makes "25000 lessons of mathematics" not only useful, but also pleasant reading. He skillfully combines theory with practice, which allows the reader not only to remember, but also to understand the material. In. and . Ryzhik is also the author of other well-known works, such as Mathematics for All and Algebra Without Fear, which have also received recognition for their accessibility and clarity of presentation. If you are looking for a book that will help you or your children to fall in love with mathematics, as well as learn how to apply it in life, “25,000 lessons of mathematics” will be an excellent choice. This work will not only expand your knowledge, but also open new horizons in understanding this amazing subject. Don't miss the opportunity to immerse yourself in the world of numbers and formulas with the Redhead B. and . This is a journey that will definitely bear fruit!