These signs were found on the entrance to a parking garage on 1st Ave. in Phoenix, Arizona.

The top sign says...

+------------------------------------------------+ | Clearance 6'8'' Maximum Vehicle Load 6000 Lbs. | +------------------------------------------------+Upon first seeing the clearance/load sign, we immediately thought about having a

`pounds_to_tons`

conversion function, but we ended up with off-by-one math.pounds_to_tons(6000) = 8 - 6 (+ 1) observe... 6000 pounds equals 3 short tons (2.68 long tons) 8 - 6 = 2Math was found when the informational sign was taken into consideration with the word "ten" converted into the number 10.

+------------------------------------------------+ | Clearance 6'8'' Maximum Vehicle Load 6000 Lbs. | +------------------------------------------------+ +----------------------------------------------+ | Maricopa County Employee Parking | | + Do not park in reserved/designated areas | | without permit | | + Do not back into or drive through spaces | | + Do not block driveway or access | | + Do not grant access/scan for others | | + No foot traffic on entrance gate arms | | + Speed limit is ten (10) miles per hour | | + Drive with headlights on | | + Park at your own risk | | | | + For assistance please contact your parking | | coordinator or protective services | | at (602) 506-3700 / 24 hrs | +----------------------------------------------+ the numbers are: 6 8 6000 10 10 602 506 3700 24 A key to getting started was to see that 100 from 3700 is the square number 3600 and that the square root 3600 (i.e. 60) is a factor of 6000 (6000 / 60 = 100). Another key was to see that the difference between 602 and 506 was only four away from being 100. the math is: 6000 / sqrt(3700 - 10 * 10) = 602 - 506 + (8 - 24 / 6) observe... left-hand side: 10 * 10 = 100 3700 - 100 = 3600 sqrt(3600) = 60 6000 / 60 = 100 right-hand side: 602 - 506 = 96 24 / 6 = 4 8 - 4 = 4 96 + 4 = 100

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

**Created:** 19 July 2007

This work is licensed under a Creative Commons License.