There are many countries around the world that hold Mathematics Competitions. The Competitions are extremely interesting since many professors try to create new interesting problems. If you want to take part in these competitions, you have to solve many problems. That means you must master your problem-solving skills.

Challenging Problems from Around the World Vol 3 is a selected problem book. This book has only two chapters. The first chapter of this book is a collection of problems. We select many good problems from different sources. Most of them used to appear in Mathematics Competitions. In this part, we want the readers try their best to solve the problems. Remember that only a few people can solve all problems in this book. So, do not be up set if you cannot solve some problems. Even we cannot solve problems, we still gain some techniques in solving problems.

The readers should keep in mind that the only way in learning Mathematics is to do Mathematics.

The second chapter of this book was written about the solution to each problem that listed in the first chapter. We try to solve the problems step by step. We believe that the solutions will help the readers to understand well. Reading through this part, we hope the readers will learn many problem-solving strategies.

Let this book be your close friend when you learn about Mathematics. We hope the readers have a great journey in reading this book.

Richard S.Hammond