BARS::Exit 148 on I-10 West in Phoenix, Arizona

These road signs are on westbound I-10 in Phoenix, Arizona.

The road signs say...

   +-----------------+ +-------------+ +--------------------+
   | Left Exit  147C | |  I-10 West  | |        Exit 147A-B |
   |     51 North    | | Los Angeles | | North 51  East 202 |
   |   HOV 2+ Only   | +-------------+ |       1/4 Mile     |
   |     1/4 Mile    |                 +--------------------+
   +-----------------+
   +---------------+
   |      Exit 148 |
   | Jefferson St  |
   | Washington St |
   +---------------+
   the numbers are:  147  51  2  1/4  10  147  51  202  1/4  148

   the math is: 
      sqrt(202-147-51)*(10+sqrt(1/4)+sqrt(1/4)) = 147-51-148/2

   observe...
      left-side:
         202 - 147 - 51 = 4
         sqrt(4) = 2
         sqrt(1/4) = 1/2
         10 + sqrt(1/4) + sqrt(1/4) = 10 + 1/2 + 1/2 = 11
         2 * 11 = 22
      right-side:
         147 - 51 = 96
         148 / 2 = 74
         96 - 74 = 22

   [exercise--solve for 'n']
      sqrt(202-147-51)*(10+sqrt(1/4)+sqrt(1/4)) = 147-51-148/n

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 02 January 2008

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