Through its engaging and unusual problems, this book demonstrates methods of reasoning necessary for learning number theory. Every technique is followed by prob

Through its engaging and unusual problems, this book demonstrates methods of reasoning necessary for learning number theory. Every technique is followed by prob

Number theory is an important research field of mathematics. In mathematical competitions, problems of elementary number theory occur frequently. These problems

A unique collection of competition problems from over twenty major national and international mathematical competitions for high school students. Written for tr

This book, written by an accomplished female mathematician, is the second to explore nonstandard mathematical problems – those that are not directly solved by