Second edition sold 2241 copies in N.A. and 1600 ROW. New edition contains 50 percent new material.

Victor Klee and Stan Wagon discuss some of the unsolved problems in number theory and geometry, many of which can be understood by readers with a very modest ma

The investigation of three problems, perfect numbers, periodic decimals, and Pythagorean numbers, has given rise to much of elementary number theory. In this bo

The goal in putting together this unique compilation was to present the current status of the solutions to some of the most essential open problems in pure and

Using an original mode of presentation, and emphasizing the computational nature of the subject, this book explores a number of the unsolved problems that still