Off-By-One Along AZ Hwy-387 in Arizona

This road sign is located along AZ Hwy-387.

The road sign says...

   +----------------------------------+
   | Casa Grande Ruins Natl Mon    14 |
   | Coolidge                      16 |
   | Florence                      23 |
   +----------------------------------+
   
   the numbers are:  14  16  23

   off-by-one:  sqrt(23 - 14) = sqrt(16) - 1
   
   ...or...

   off-by-one:
      23 / (14 / sqrt(sqrt(16))) = 23 / (14 / 2) = 23 / 7

      (23 - 1) / 7 approximates Pi
Exercises
  1. List the prime factors for the number 387.

  2. Record the value of 22 / 7 to the nearest thousandth.

  3. No or Yes. Casa Grande Ruins National Monument is 2 miles from the town of Coolidge.

Casa Grande Ruins:: Great House
Updated::2013.03.10

RoadHacker is revisiting this spot for Pi Day 2013. This BARS was BARS number 101. On 10 March 2013 there were 769 BARS.

   the numbers are:  14  16  23

   rsCardinalityEval:  sqrt(23 - 14)! / sqrt(sqrt(16)) = 3
   * There are 3 numbers in the road sign.

   BARSfunc rsCardinalityEval:  sum_digits(23) + 14 - 16 = 3
   * There are 3 numbers in the road sign.
   * sum_digits(n) = sum the digits of n
     domain:  n must be a prime number

   BARSfunc off-by-one rsAgeEval:  14 + 16 + 23 = 53 - 1
   * RoadHacker was 49 years young when he found this road sign.
     He was 55 years young when he revisited the road sign. 
   * avg(49, 55) = 52

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 08 June 2006

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