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 3 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 (not included).