This road sign is on northbound AZ Hwy-97 in Arizona.

The road sign says...

+---------------+ | Bagdad 17 | | Hillside 31 | +---------------+the numbers are: rsStateEval 17 + 31 = 48 * Arizona was the 48th state admitted to the Union. AllPrimesRS: 17 and 31 are both prime numbers AllReversiblePrimesRS: 17 and 31 are reversible primes * reverse_digits(n) = the digits of n reversed domain: n must be a prime number * reverse_digits(17) = 71 and 71 is prime * reverse_digits(31) = 13 and 13 is prime BARSfunc rsCardinalityEval: sum_digits(17) / sum_digits(31) = 2 * There are two numbers in this road sign. * sum_digits(n) = sum the digits of n domain: n must be a prime number * sum_digits(17) = 1+7 = 8; sum_digits(31) = 3+1 = 4 BARSfunc rsStateEval: sum_digits(17) * mult_digits(31)! = 48 * Arizona was the 48th state admitted to the Union. * mult_digits(n) = product of the digits of n domain: n must be a prime number * mult_digits(31) = 3*1 = 3 BARSfunc off-by-one rsAgeEval: sum_digits(17) * mult_digits(31)! = 48+1 * RoadHacker was 49 years young when he found this road sign. Note: MathBabbler created this BARS when he was 58 years young. road sign did not BARSfunc rs42Eval: mult_digits(17) * mult_digits(31)! = 48 * 42 is the "Answer to Life, the Universe, and Everything"

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

**Created:** 14 August 2015

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