ekaterina kuznetsova, gymnasium of the city of svetlogorsk.a, secondary school number one in the city of osipovichi named after dmitriev and history teacher and social science alexey dmitrievich kosov. i have one more person left to introduce, this is our scientific expert, ekaterina duko. head of the department of methodological support for mathematical and natural science education of the academy of education. in case of controversial situations, it is she who will decide whose side is right. hello guys, i wish you a good mood, an interesting game, correct answers and good luck to all participants. good afternoon guys, we are glad to welcome you here. on our playground, this time, my colleague yulia pertsova is already communicating with your teachers, yulia, over to you, we have so many men in the teachers’ room today and not one came with flowers, but we don’t have the byy factor and i, not olya buzova, we have an intellectual show and not less interesting guys, good luck to everyone, vasya, start the first round. the first round is ahead,