This road sign was found three miles north of Yarnell, Arizona, on AZ Hwy-89.

The road sign says...

+--------------+ | Yarnell 3 | | Congress 13 | | Phoenix 81 | +--------------+the numbers are: 3 13 81 the off-by-one math is: 13 - 3 = sqrt(81) + 1## Update::2013.07.11

19 firefighters died while fighting a fire near Yarnell.

the numbers are: 3 13 81 the math is: 81 % 13 = 3 more math: truncate(81 / 13) = 3! BARSfunc rsAgeEval: 81 - reverse_digits(13) + 3! = 56 * MathBabbler was 56 years young when this update was posted. * reverse_digits(n) = the digits of n reversed domain: n must be a prime number * 13 is prime; reverse_digits(13) = 31

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 24 September 2006

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