BARS::Heading North on Coconino County Road 3

This road sign was discovered while driving north on primed numbered Coconino County Road 3 during Spring Break 2006.

The road sign says...

   +----------------------+
   | <- V Bar V Ranch   1 |
   | <- Poor Farm       5 |
   | <- West Clear Cr.  9 |
   +----------------------+
   |  81  |
   |  <-  |
   +------+
   the numbers are...  1  5  9  81

   the math is:  1 + 5 + sqrt(9) = sqrt(81)

   observe...
      sqrt(9) = 3   
      sqrt(81) = 9

   another calculation using three square roots:
      sqrt(sqrt(81)) + sqrt(9) - 5 = 1

   observe...
      sqrt(sqrt(81)) = 3
      sqrt(9) = 3
      3 + 3 - 5 = 1

   [exercise] Pretend the two V's are Roman numerals.
              Roman numeral V equals decimal number 5.
              The numbers now are:  1  5  5  5  8  91
              Find a math equation without using (5 - 5).

This road sign was submitted to RoadSignMath.com on 18 March 2006.

RoadHacker Nanofoo

Pictures from Arizona...

{open road} {Artie Artichoke} {Pi mileage post} {martian friendly Flagstaff}
{Meteor City} { I-40 Winslow roadsign} {Artie Artichoke again}
Update::2009.04.17

This BARS was selected to be one of the BARS of the Week for week #13 of the spring 2009 semester.

   the numbers are...  1  5  9  81

   more math:  cuberoot(81 / sqrt(9))! - 5 = 1

   rsPhiEval:  (1 + sqrt(5)) / (sqrt(9)! / sqrt(sqrt(81))) = Phi
   * Phi is the golden ratio and it approximates 1.61803399

   rsAgeEval:  81 - (sqrt(9)! * 5) * 1 = 51
   * MathBabbler was 51 years young when he found this equation

   rs42Eval:  5! - 81 + sqrt(9) * 1 = 42
   * 42 is the "Answer to Life, the Universe, and Everything"

   rs42Eval:  summation(5, 9) + sqrt(sqrt(81))! + 1 = 42
   * summation(5, 9) = 5 + 6 + 7 + 8 + 9 = 35

   rsHwyEval:  81 / 9 - 5 - 1 = 3
   * This road sign is on Coconino County Road 3

   rsHwyEval:  cuberoot(81 - (9 * (5 + 1))) = 3

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 18 March 2006
+ added the Roman numerals exercise

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