One and a half digger! Olympiad tasks in mathematics. GEF

The proposed manual contains various types of olympiad tasks corresponding to the age characteristics of students of primary and secondary school age.
Thanks to the solution of such problems, the student forms such operations as analysis, synthesis, comparison, generalization and classification.
The tasks of different types, topics, difficulty levels are given a score so that the student does not have the feeling that he is dealing with the textbook.
answers are given to all tasks, and many of them are decisions.
The manual is addressed primarily to students, their parents, and teachers of mathematics - to prepare children for Olympiads, students of pedagogical universities - future teachers, as well as all fans of mathematics