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The proposed collection of problems contains tasks from the second and third rounds of the Mykolaiv Mathematical Olympiads. The materials of the manual can be useful in preparing students for mathematical competitions under the guidance of a teacher or in individual work. Solutions or instructions and answers are provided for all tasks.

The book contains more than 100 problems for each grade: from 6 to 11. All tasks contain solutions and answers for easy checking and saving the teacher's time.

For students in grades 6-11 of secondary schools of all types who are interested in preparing for mathematical competitions, as well as for mathematics teachers and leaders of mathematical clubs.