Mathematics with Boris Trushin. Theory of numbers: from scratch to Euler's theorem. Trushin B.V.

Boris Trushin has been teaching the mathematics of schoolchildren and students for almost 25 years, is the co-author of school textbooks on algebra, and has been conducting the same YouTube channel in subsidiary mathematics for 7 years. and allows you to master the basics of this interesting section of mathematics without any preliminary knowledge. Tasks for the theory of numbers are often found at mathematical olympiads, and in the exam. You will go an exciting path: from the basics - you will understand where the properties of multiplication came from, and why the division algorithm works into a column, and end the Euler theorem.