This sign collection was found in Tempe's Maple Ash neighborhood.

Top sign: Diamond-shaped yellow warning sign saying "Speed Humps 20mph"

Middle sign: Rectangular-shaped yellow sign saying "Next 1600ft"

Bottom sign: Rectangular-shaped white restricted parking sign saying "restricted parking, area 2, resident permit parking only, 24 hour, Monday thru Saturday."

the numbers are: 20 1600 24 2 the math is: sqrt(20 - (sqrt(1600) - 24)) = 2 observe... sqrt(1600) = 40 40 - 24 = 16 20 - 16 = 4 sqrt(4) = 2 more math: sqrt(sqrt(20 - sqrt(sqrt(1600) - 24))) = 2 sqrt(sqrt(20 - sqrt(40 - 24))) sqrt(sqrt(20 - sqrt(16))) sqrt(sqrt(20 - 4)) sqrt(sqrt(16)) sqrt(4) = 2 [solve for 'n'] sqrt(20 - (sqrt(1600) - n)) = 2

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

**Created:** 27 January 2006

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