Mathematicians beginner, amateur, and professional alike thrill to find simple, elegant solutions to seemingly difficult problems. Such happy resolutions are called aha solutions, a phrase popularized by mathematics and science writer Martin Gardner. Aha solutions reveal the beauty of mathematics. This book is a collection of problems with aha solutions.

Mathematical ideas with aesthetic appeal for any mathematically minded person.

Praise for the First Edition

-This excellent text should prove a useful accoutrement for any developing mathematics program . . . it's short, it's sweet, it's beautifully written.- --The Mathematical Intelligencer

-Erickson has prepared an exemplary work . . . strongly recommended for inclusion in undergraduate-level library collections.- --Choice

Featuring a modern approach, Introduction to Combinatorics, Second Edition illustrates the applicability of combinatorial methods and discusses topics that are not typically addressed in...