These road signs were printed on the front-page of the Arizona Republic on 12 September 2013.

The road signs say...

+-----------+ +-----------+ | Exit 298 | | Exit 298 | | 179 North | | 179 North | | Sedona | | Sedona | | 1/4 Mile | | 1/4 Mile | +-----------+ +-----------+the numbers are: 298 179 (1/4) 298 179 (1/4) the math is: (298 / 298 + 179 / 179) * (1/4) = sqrt(1/4) more math: 298 - 298 + 179 - 179 + 1/4 = 1/4 ... BARS playground ... sum_digits(179) = 17 * sum_digits(n) = sum the digits of n * domain: n must be a prime number; 179 is prime mult_digits(179) = 63 * mult_digits(n) = product of the digits of n * domain: n must be a prime number; 179 is prime spf(298) = 2+149 = 151 * spf(n) = the sum of the prime factors of n * domain: n must be composite number; 298 is not prime

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

**Created:** 12 September 2013 (posted 14 September 2013)

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