Test your knowledge when telling time. With analytical mathematical equations at each number space, this clock keeps your math skills sharp. Black powder coated metal is made to look like a chalkboard with each math equation written in white chalk. The perfect gift for your favorite braniac.
• Work out the mathematical equations to determine the hour
• Black powder coated metal
• Easy-to-hang with "keyhole" opening on the back of the clock
• Measures 11-1/2-inch diameter • Requires 1 aa battery (not included)
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