The Collection of Problems in Number Theory is a fascinating and in-depth study created by talented authors Des E. and . and Kotov L. In. , which will become an indispensable assistant for students, teachers and anyone interested in mathematics at a deeper level. This book is a unique resource that not only helps to master the theory of numbers, but also develops analytical thinking, logical abilities and creative approach to solving problems. Number theory is one of the most ancient and at the same time the most relevant areas of mathematics, studying the properties of integers. In this collection, readers will find a variety of problems covering both classical and modern aspects of number theory. Each task is designed taking into account different levels of complexity, which allows both beginners and experienced mathematicians to find something useful for themselves. The book will be especially interesting for students of mathematical faculties, graduate students and teachers, as well as for anyone who is ready to plunge into the world of numbers and their mysteries. If you are interested in mathematics, like to solve puzzles or just want to expand your knowledge in this area, the "Collection of problems in the theory of numbers" will become your faithful companion. Topics covered in the book range from simple properties of numbers to more complex concepts such as divisibility, prime numbers, Fermat and Euler theorems, and modern advances in cryptography and computational mathematics. Each task is accompanied by detailed comments and solutions, which allows the reader not only to test their knowledge, but also to understand how to apply theoretical concepts in practice. Authors, Des E. and . and Cats L. In. are known for their in-depth knowledge of mathematics and pedagogics. They have already established themselves as authors of textbooks and manuals, which are popular among students and teachers. Their writing style is clear and accessible, which makes even the most complex topics understandable to a wide audience. This book is not just a collection of problems - it is a real workshop for the development of mathematical thinking. It encourages the reader not only to look for the right answers, but also to ask questions, explore and delve into the topics being studied. Reading this collection can be the first step to participating in mathematical Olympiads or competitions, where you need not only knowledge of the theory, but also the ability to apply it in practice. If you are looking for books on number theory that will help you prepare for exams or just deepen your knowledge, the “Collection of Problems in Number Theory” is the perfect choice. It will become not only a textbook, but also a source of inspiration for those who want to understand how numbers can be not only abstract symbols, but also keys to solving many mysteries of the surrounding world. In conclusion, Desa E's Compendium of Problems in Number Theory. and . and Kotova L. In. This is not just a book, but a whole world in which everyone who wants to expand their horizons in mathematics should immerse themselves. This work will be your reliable assistant in the study of number theory and will help you discover the beauty and complexity of this amazing world.