These highway signs are on US Hwy-30 in downtown Joliet, Illinois.

The highway signs say...

+-----------+ | I-80 | ------------- | US Hwy-6 | ------------- | IL Hwy-53 | +-----------+the numbers are: 80 6 53 the math is: cuberoot(80 - 53)! = 6 BARSfunc rsHwyEval: 80 - 53 + defactorial(6) = 30 * These highway signs are on US Hwy-30. off-by-one rsAgeEval: 53 + 80 % 6 = 54+1 * RoadHacker was 54 years young when he found these highway signs. ...playground... spf(80) = 2+2+2+2+5 = 13; spf(6) = 5 * spf(n) = the sum of the prime factors of n 53 is a prime number * sum_digits(53) = 8; mult_digits(53) = 15; reverse_digits(53) = 35 * sum_digits(n) = sum the digits of n * mult_digits(n) = product of the digits of n * reverse_digits(n) = the digits of n reversed * domain: n must be a prime number BARSfunc math: spf(80) - spf(6) = sum_digits(53)

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

**Created:** 19 August 2011

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