Math Problems of the Month

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Welcome to the Math Problems of the Month Page. For each month, I will feature a math problem by which I myself create. Every month will have a different problem with an answer posted at the end of the month. Feel free to discuss on a forum so that those who don't understand might get it better. The difficulty will vary: some will be easy, and some will be challenging. Some problems will require some logical thinking. The list is cumulative, so have fun with past problems and indulge in the challenge of the new!
Table of Contents

2008

September

A circle has a circle within it. The larger circle's radius is congruent to the smaller circle's circumference. The circumference of the larger circle is 12.4 centimeters. What is the measure of area between the two circles' boundaries?

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