The book is released on the occasion of the popular International Mathematics Competition "Kangaroo". This competition takes place every year in the second half of March. Over 5 million students from the 2nd grade of primary school to the 3rd grade of high school participate worldwide. The philosophy of the competition is based on the principle that mathematics cultivates thinking and brings intellectual satisfaction, so it should not only be addressed to a few. The questions asked in the competition do not require special mathematical knowledge to solve them. Most can be solved with just common sense. The main characteristic of the topics is their simplicity, originality, and the accompanying element of fun.

Although the book is aimed at students, any reader, regardless of age or specialty, can find interesting articles and problems.

The book contains
- the questions and solutions of the Kangaroo Competition, 2014 edition, for all levels, a total of 165 questions.
- articles - exercises - problems, from the 2nd grade of primary school to the 3rd grade of high school.
- entertaining mathematics