The Book of Mathematics . Regional Olympiads . Grades 8-11 by H. X. Aghakhanova, I. and . Bogdanova, P. A. Kozhevnikova and others is not just a textbook, but a real find for everyone who seeks to deepen their knowledge in mathematics and prepare for the Olympiads of various levels. This edition will be a faithful companion for schoolchildren, teachers and parents who want to develop mathematical thinking and learn how to solve complex problems. The book contains the tasks that were proposed at the regional Olympiads, which allows readers not only to get acquainted with typical questions, but also to understand how to properly approach the solution of non-standard tasks. Each section contains theoretical materials that will help the reader to master the necessary concepts, as well as practical tasks that contribute to the consolidation of knowledge. Particular attention is paid to the methods of solution, which makes the book useful not only for preparing for the Olympics, but also for the general development of mathematical skills. This book will be interesting for students of grades 8-11 who want not only to learn, but also to achieve high results in mathematics. It is suitable for both those who already have experience in participating in the Olympiads, and for beginners who want to try their hand at solving complex problems. Teachers of mathematics will also find in it a lot of useful materials to prepare their students for competitions, and parents will be able to use it as an additional resource to support the educational process of their children. The topics raised in the book cover a wide range of mathematical disciplines: from algebra and geometry to combinatorics and number theory. The authors emphasize the importance of developing logical thinking and a creative approach to solving problems. Each task in the book is accompanied by a detailed analysis, which allows the reader not only to find the right answers, but also to understand the logic behind each solution. This makes the book especially valuable for those who aspire not only to success in the Olympics, but also to a deep understanding of mathematics as a science. The style of the authors is distinguished by clarity and accessibility, which makes the material easy to perceive. N. X. Aghakhanov, I. and . Bogdanov and P. A. Kozhevnikov experienced teachers and mathematicians who know how to convey complex ideas to young minds Their previous work has also been recognized and has become the basis for many mathematics training courses. They are able to inspire and motivate, which makes their books not only tutorials, but also real guides to the world of mathematics. If you are looking for a high-quality guide to prepare for the Olympics, then “Mathematics . Regional Olympiads . 8-11 grades" will be an excellent choice. This edition will help you not only improve your mathematical skills, but also learn to think outside the box, which is an important aspect in solving problems of any complexity. Read, decide and win with this book you will be able to reach new heights in mathematics!