These road signs were found on westbound I-10 in Phoenix, Arizona.

The road signs say...

+-------------+ +-------------+ +----------------+ +-----------+ | HOV 10 West | | 10 West | | Exit 1A | | Exit 1B | +-------------+ | Los Angeles | | 10 East Tucson | | 24th St | +-------------+ | 51 North | | 1/4 Mile | | 1/2 Mile | | Exit Only | +----------------+ +-----------+ the numbers are: 10 10 1 10 51 (1/2) 1 24 (1/4) /---------- A ----------\ /------ B ----\ the math is: (10 + 10 + 10 + 24 - 1 - 1) - (sqrt(1/4) + 1/2) = 51 observe... A = 10 + 10 + 10 + 24 - 1 - 1 = 52 B = sqrt(1/4) = 1/2; 1/2 + 1/2 = 1 A - B = 52 - 1 = 51

**Creator:** Gerald D. Thurman
[gthurman@gmail.com]

**Created:** 25 March 2007

This work is licensed under a Creative Commons License.