Maths. Elements of logic and theory of sets in the tasks of the OGE and the exam

This manual is intended for graduates who pass the OGE and the exam at the basic and specialized levels, as well as for teachers organizing the process of preparing for exams.
The book briefly sets out the basic laws of the logic of statements and the theory of sets and their application is considered when solving some logical problems and tasks on the theory of probabilities proposed on the OGE and the exam.
This manual also provides samples of solutions to many tasks of the USE level that requires simple logical reasoning and quick wit, the properties of divisibility and their use in solving some problems of the USE level, tasks with economic content and olympiad tasks of the exam of a specialized level