Love math and always boast to the rest of your mates on just how fast your mind is? The Pop Quiz Math Clock ought to stop you in your tracks for a while as you wonder what time it is, until you realize that those formulas can always be substituted by the traditional numbers on any wall clock. Measuring 11.5″ in diameter, the Pop Quiz Math Clock is powered by a solitary AA battery and will retail for $29.99.
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