These highway signs are along Route 66 (Business I-40) in Flagstaff, Arizona.

The highway signs say...

+----------------+ | To East I-40 | | To North US-89 | | East US-180 | | Arizona US-66 | | Business I-40 | | To South I-17 | | To West I-40 | +----------------+the numbers are: 17 40 40 40 66 89 180 the math is: mode(17, 40, 40, 66, 89, 180) = 40 off-by-one math: (180 % 89)^(40 % 17) + 180 % 89 + 40 / 40 = 66+1 rsAgeEval: 66 + 40 - 40 - (180 % 17) + sqrt(89 % 40) = 59 * RoadHacker was 59 years young when he found these highway signs. rsStateEval: 180 % 66 + 40 % 17 - sqrt(89 - 40 - 40)! = 48 * Arizona was the 48th state admitted to the Union. rsHwyEval: median(17, 40, 40, 40, 66, 89, 180) = 40 * This highway signs are on Business I-40 off-by-one rsAgeEval: 180 % 66 + 40 % 17 + sqrt(89 - 40 - 40)! = 59+1 * RoadHacker was 59 years young when he found these highway signs. ...playground... 180 % 66 = 48; 180 % 89 = 2; 180 % 40 = 20; 180 % 17 = 10 89 % 40 = 9; 66 % 17 = 15; 40 % 17 = 6 180, 66, and 40 are composite numbers * spf(n) = the sum of the prime factors of n; domain: n must be a composite number ...spf(180) = 2+2+3+3+5 = 15 ...spf(66) = 2+3+11 = 16 ...spf(40) = 2+2+2+5 = 11 17 and 89 are prime numbers * sum_digits(n) = sum the digits of n domain: n must be a prime number ...sum_digits(17) = 8 ...sum_digits(89) = 17 * mult_digits(n) = product of the digits of n domain: n must be a prime number ...mult_digits(17) = 7 ...mult_digits(89) = 72 * reverse_digits(n) = the digits of n reversed domain: n must be a prime number ...reverse_digits(17) = 71 (71 is prime) ...reverse_digits(89) = 98

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

**Created:** 27 September 2016

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