These road signs were found on southbound I-17 one-half mile from Sky Harbor Intl. Airport in Phoenix, Arizona.

The road signs say...

+------------+ +-----------+ | Exit 194 | | Exit 195A | | 10 West | | | | Sky Harbor | | 16th St | | 1/2 Mile | | | +------------+ +-----------+ the numbers are: 10 (1/2) 16 194 195 the math is: 1/2 x 10 - sqrt(16) + 194 = 195 observe... 1/2 x 10 = .5 x 10 = .5 .5 x 10 = 5 sqrt(16) = 4 5 - 4 = 1 1 + 194 = 195 [more math added on 28 April 2007 after driving home from a P-10 math meeting in downtown Phoenix] more math: (195 + log(10) - 194) / (1/2) = sqrt(16) observe... log(10) = 1 2 / (1/2 = 2 x 2 = 4 sqrt(16) = 4

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

**Created:** 11 November 2006

This work is licensed under a Creative Commons License.