Аннотация
The material of the article includes tasks of certain importance, there is a detailed solution to these problems using certain methods and methods, and some opinions of individual scientists are taken into account. The tasks are of the Olympiad and creative type. The following topics were considered: physics – on the topics "Temperature. Specific heat capacity", in mathematics – on the topics "Differentiation. Integration", a concentration problem that has been solved mathematically and chemically.