BAB::Employee Parking Garage on 1st Ave. in Phoenix, Arizona

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 = 2  

Math 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

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