New Facets of Mathematics

This book is a continuation of the previous one: "One Hundred Facets of Mathematics".
In it, as in the previous one, a hundred test problems are gathered with detailed solutions, comments, and illustrations.
All problems are conveniently supplied with answer options, from which the correct one must be chosen, but often the correct answer is not what comes to mind first.
Most of the problems were invented by the author and were presented at various mathematical Olympiads or published in the magazine "Kvantik". All problems are illustrated with engaging pictures by the artist N. N. Krutikov.