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Pop Quiz Clock

Ideal for every math whiz, child prodigy, or just that friend that always thinks he's the smartest in the group.

This clock features a math problem to solve in place of traditional clock numbers. Instead of reading a boring, 7:00, it will read "52 - x2 + x = 10" The clock background also resembles a chalkboard!

Details: measures 11.5 inches in diameter. Requires one AA battery (not included).