Andreescu T. Problems from the Book 3ed 2024

Textbook in PDF format

The authors provide a combination of enthusiasm and experience which will delight any reader. In this volume they present innumerable beautiful results, intriguing problems, and ingenious solutions. The problems range from elementary gems to deep truths. A trully delightful and highly instructive book, this will prepare the engaged reader not only for any mathematics competition they may enter but also for a life time of mathematical enjoyment. A must for the bookshelves of both aspiring and seasoned mathematicians.
For this third edition we added a number of problems and examples. We kept the relative order of the problems for practice in the previous editions (where the problems were ordered by increasing difficulty, even though this is of course very subjective), the new problems for practice are therefore always at the end, which does not necessarily mean that they are very difficult. Similarly, we added about two or three new examples in most chapters, and corrected a number