This collection of 2000 problems contains interesting, sometimes amazing exercises of elementary mathematics. The solutions are short and striking. A good number of chapters of the book provide a rich store of exercises neglected by other problem-books, e.g., "Function equations", "Geometrical constructions", in addition to the new exercises from classical topics. Elementary mathematics - according to definition - does not exceed secondary school level, so it represents no difficulty regarding unknown notions for a student inclined to solve brainteasers. It is up to the reader to decide which one to cope with from among the exercises scaled by degree of difficulty.