# 23

This number is a prime.

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Kristen Eller ©2002 |

_{k}. [Green]

Dwayne "The Rock" Johnson plays Agent 23 in the 2008 movie GET SMART. [Green]

There are 23 essentially different ways to color the nine squares of a 3-by-3 checkerboard, such that 5 of the squares are black, and 4 are red. Z = RED, O = BLACK:

OZO OZO ZOO ZZO ZZO ZZO ZOO ZOO ZOZ ZZZ ZZZ ZZO OZZ ZOZ ZOZ OZZ OZO OOO OOO OOO OOO OOO OZO OZO ZZZ ZZZ ZZZ ZZO ZZO ZZO ZZO ZOZ ZOO OOZ ZOZ ZOO OZO OOO OOO OOO OOZ ZOO ZZO ZZO ZZO ZOO OOO OOO OZO ZZO OZZ OOZ OOZ OOO OOZ OOZ OZO ZZZ ZOZ ZOZ ZOZ OOO ZOO OZO OOO ZOO OOZ OOZ ZOZ[Green]

(There is one curio for this number that has not yet been approved by an editor.)

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