Занимательная алгебра

Sometimes it seems that algebra is a strange, incomprehensible beast that just waits to bite and leave marks in the diary in the form of failing grades? This is not true at all! Algebra is not a beast at all, but a very exciting science. The thing is, not everyone can tell about it as captivatingly as Yakov Isidorovich Perelman, a mathematician and famous popularizer of science. With him, we will embark on an amazing "algebraic" journey: we will become explorers, meet puzzle lovers from Ancient India, learn the secrets of fire combustion, and fly to the Moon.