1.2.2 Куры и коровы | Задача 2 | Задачи по математике для поступающих в 5 класс

New channel Лекториум: title sample judged 'whole' (An extensive open-lecture archive of real university courses and academic talks across many disciplines, with only a sma); passed a second screen for sellers/exam-prep/re-uploads; 3 of 3 sampled transcripts showed teaching, 0 not; every title checked strictly; oEmbed verified.