This road sign is on AZ Hwy-85 in Arizona.

The road sign says...

+------------------+ | Why 17 | | Gila Bend 71 | +------------------+the numbers are: 17 71 AllPrimesRS: 17 and 71 are both numbers. In addition, 17 and 71 are a "reversible prime pair." rsAgeEval: 71 - 17 = 54 * RoadHacker was 54 years young when he found this road sign. off-by-one rsCardinalityEval: 71 % 17 = 2+1 * There are two numbers this road sign. From the BARSfuncLib... * mult_digits(n) = product of the digits of n domain: n must be a prime number * sum_digits(n) = sum the digits of n domain: n must be a prime number * reverse_digits(n) = the digits of n reversed * domain: n must be a prime number BARSfunc math: reverse_digits(17) = 71 reverse_digits(71) = 71 BARSfunc rsCardinalityEval: cuberoot(sum_digits(17)!/mult_digits(71)!) = 2 BARSfunc off-by-one rsStateEval: mult_digits(17) * mult_digits(71) = 48+1 * Arizona was the 48th state admitted to the Union.This road sign has me considering added the

rsPresidentEvalto the BARSrsEvals(road sign evaluations).rsPresidentEval: avg(17, 71) = 44 * Barack Obama was President when RoadHacker found this road sign. * Obama was the 44th President of the United States of America.

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

**Created:** 20 May 2012

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