BARS::15 Miles From Mitchell Caverns in California

This road sign is in the Mojave National Preserve.

The road sign says...

   +--------------------------+
   | Campgrounds              |
   |   Hole In The Wall    20 |
   |   Midhills            28 |
   | Mitchell Caverns      15 |
   +--------------------------+
   the numbers are:  15  20  28

   BARSfunc math:  spf(15) + 20 = 28
   * spf(n) = the sum of the prime factors of n
   * spf(15) = 3+5 = 8

   BARSfunc rsAgeEval:  15 + spf(20) + 28 = 52
   * RoadHacker was 52 years young when he found this road sign.
   * spf(20) = 2+2+5 = 9

   off-by-one rsStateEval:  15 * cuberoot(28 - 20) = 31-1
   * California was the 31st state admitted to the Union.

   BARSfunc off-by-one rsAgeEval:  20 + reverse_digits(28 - 15) = 52-1
   * MathBabbler  was 52 years young when he found this road sign.
   * reverse_digits(n) = the digits of n reversed
   * domain:  n must be a prime number
   * 28 - 15 = 13 and 13 is prime; reverse_digits(13) = 31

BARS::15 Miles From Ivanpah Road in California has the same numbers as this BARS.


Creator: Gerald Thurman [gthurman@gmail.com]
Created: 20 March 2010

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