and primary school teacher tatyana igorevna bogdanovich sofya sharova the gymnasium in the city of mstislavl finds opportunities when other people cannot see a single one and the teacher-organizer daria alexandrovna anastasia lebedeva, secondary school number 145 in minsk, she always has her own view on solving the problem, since she is a lot mathematics teacher valentina evgenievna koroleva knows and can do it, i just have to introduce one more person. this is our scientific expert ekaterina duplo, head of the methodological support department. naturally mathematical education of the national institute of education in case of disputes. she will decide which side of the truth ekaterina is on. hello guys. wish you all good luck with correct answers and good mood today. guys, we are glad to welcome you on our set, before we get into the questions and answers. i would like to offer you, according to tradition , to wish you good luck to yourself and your colleagues in the game. right now, in the teacher's room, along with your teachers, is my colleague, yulia pertsova, who conveys the word faith