BARS::The Roundabout in Bisbee, Arizona

This roundabout road sign is in Bisbee, Arizona.

The roundabout road sign says...

   +--------------------------+
   |               West AZ-80 |
   | West AZ-92               |
   | Sierra Vista  East AZ-80 |
   +--------------------------+
   the numbers are:  92  80  80

   the math is:  none found

   do borrowing:  take 2 away from 92 and assign 1 to each 80

   the numbers become:  90  81  81

   the math is:  90 - 81 = sqrt(81)

   off-by-one spf(n) math:  spf(92) = spf(80) + spf(80) + 1

   observe...
      spf(92) = 2 + 2 + 23 = 27
      spf(80) = 2 + 2 + 2 + 2 + 5 = 13
      spf(80) + spf(80) = 13 + 13 = 26

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 31 December 2007

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