...invaluable to anyone involved in training national mathematics teams or simply interested in challenging problems from elementary mathematics. -- Zentralblatt für Mathematik
Hats off to Andreescu and Feng for putting together this interesting collection of the best from around the world. -- Alan Law, Crux Mathematicorum
This is a wonderful book for puzzle lovers...it belongs in the hands of everyone interested in National Mathematics Contests. -- Carl Mueller, MAA Online
This volume contains a large range of problems, with and without solutions, taken from 25 national and regional mathematics olympiads from around the world. Students preparing for these competitions and teachers and general readers looking for interesting problems will find this collection very useful.