In math, irrational numbers are those that can't be represented
by simple fractions. Two examples are pi and the square root of
2. Designed by a mathematician, for mathematicians (and others
in the know, like engineers and scientists), this clock tells
time in irrational numbers logically placed on a 360-degree
circle. For example, pi (3.14159...) is just a few degrees past
where the 3 would be on a regular clock face. Black with white
markings and hands, metal clock runs on 1 AA battery. 12"
diameter.