Road Sign Math

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Phoenix

December 19th, 2005 · 3 Comments

Arizona

Gerald Thurman brings us this very, very blue sign from downtown Phoenix, Arizona.

This sign has to avoid the tautology rule in it’s solution. Technically, any sign that has any number of pairs of numbers, with no extra numbers, can be made to work.

17 + 10 - 17 = 10

This sign is found at the intersection of 3rd Street and Grant St. The GPS coordinates are approximately N33 26 28.4 W112 04 11.2. See sign on map!

Tags: Arizona

3 responses so far ↓

  • 1 David Slauenwhite // Dec 21, 2005 at 7:23 am

    And is that a sign goof, too, as a bonus? TO SOUTH I-10.

  • 2 Sarah in Phoenix // Dec 21, 2005 at 1:32 pm

    Although the sign for SOUTH I-10 is a misprint, I-10 does actually run North South in Arizona between Phoenix and Tucson.

  • 3 lowly_optiker // Jan 9, 2006 at 4:49 pm

    I think it’s even more elegant using vector notation: -17i -10i + 17i + 17i = 0, where i is a generic unit vector. :)

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