Not long ago, I posted a really cool shirt for math geeks that you could buy and now somebody has come up with some really cool wall clocks for math geeks.  The first clock is called a Math Pop Quiz wall clock.  Here is a picture with the product description below.  You can buy it from Amazon for $29.38 (as of this writing).

Get the conversation going the next time the MENSA meeting is at your place. Made of lightweight black metal with a matte finish Measures 11.5″ diameter Requires 1 AA Battery (not included) Easy-to-hang with “keyhole” opening on the back of the clock Work out the equations to determine the hour Fun and challenging Makes a great gift for your favorite Brainiac !

The next clock is an irrational numbers clock. You can buy it from Bas Bleu for $34.95. The description is below the picture.

On our charmingly quirky wall clock, irrational numbers–those that can’t be represented by simple fractions–replace the usual markings of a traditional clock face. The numbers, though admittedly “irrational,” are logically arranged. For example, pi (3.14159…) is just a few degrees past where a three would normally be. Mathematicians and other numerical whizzes (engineers, accountants…anyone with a fancy calculator) will derive a virtual eternity of laughs from this clever home or office accessory. Black with white details, the 12″-diameter metal clock runs on one AA battery.