This road sign is on westbound I-10 in Phoenix, Arizona.

The road sign says...

+----------------------+ | 7th Ave 3/4 | | 19th Ave 1 1/2 | | Jct I-17 2 | +----------------------+the numbers are: 7 (3/4) 19 (1 1/2) 17 2 the math is: sqrt(7 - 2 * sqrt(3/4 + 1 1/2)) + 17 = 19 observe... 3/4 + 1 1/2 = 2 1/4 sqrt(2 1/4) = sqrt(9/4) = sqrt(9)/sqrt(4) = 3/2 3/2 * 2 = 3 7 - 3 = 4 sqrt(4) = 2 2 + 17 = 19

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

**Created:** 17 August 2008

This work is licensed under a Creative Commons Attribution 3.0 United States License.