Think of any number, one through twelve, which appears on the clock face. Now place your fingertip on the twelve. You're going to make three moves to arrive at a random number.

First, you must spell the number you thought of (one through twelve), making one move clockwise around the circle for each letter. In other word, if you thought of "one" you'd spell "o-n-e", moving your finger to the one, the two, then the three.