These road signs were found on westbound Loop 202 at its junction with I-10 in Chandler, Arizona.

The road signs say...

+-----------+ +------------+ | Exit 55A | | Exit 55B | | 10 Tucson | | 10 Phoenix | +-----------+ +------------+ the numbers are: 55 10 55 10 the math is: sqrt(55 + 55 - 10) = 10Generally, road signs containing four numbers--only two of which are unique--are ignored because of trivial math.

trivial math: 55 + 10 = 10 + 55 [commutative] 55 - 55 = 10 - 10 55 x 10 = 10 x 55 [commutative] 55 / 55 = 10 / 10 55 / 55 = (10 - 10)!

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

**Created:** 07 May 2007

This work is licensed under a Creative Commons License.