For ages, people have amused themselves by trying to find solutions to the world's most challenging problems. Although it takes a bit of insight and intuition to solve some puzzles, usually the pure mathematical way of reasoning is not the key to the solution. The Chinese, Indian, and Arabian cultures are filled with such brain teasers. Try your hand at discovering the beauty of these problems. You may also want to try the Problem of the Week. To view the Problem of the Week, click on Spherie.