This road sign is on southbound I-17 in Arizona. The picture was taken from the back of a Greyhound bus.

The road sign says...

+-----------------------+ | AZ Hwy-169 South 7 | | Cordes Jct 22 | | Phoenix 87 | +-----------------------+the numbers are: 169 7 22 87 the math is: 87 % 7 = sqrt(22 - sqrt(169)) more math: summation(sqrt(sqrt(169 + 87)), 7) = 22 * sqrt(169 + 87) = sqrt(256) = 16; sqrt(16) = 4 * summation(4, 7) = 4+5+6+7 rsPiEval: log(sqrt(87 + sqrt(169))) * 22 / 7 ~= Pi * 22/7 approximates Pi rounded to nearest hundredth (3.14) rsAgeEval: 169 - 87 - 22 - 7 = 53 * RoadHacker was 53 years young when he found this road sign. rsAgeEval: sqrt(sqrt(169 + 87))! + 7 + 22 = 53 * RoadHacker was 53 years young when he found this road sign. off-by-one math: sqrt(169 + 87) + 7 = 22+1 off-by-one math: 87 % 22 - sqrt(169) = 7+1 BARSfunc math: spf(87) - spf(16) + 7 = spf(22) * spf(n) = the sum of the prime factors of n * spf(87) = 3+29 = 32; spf(169) = 13+13 = 26; spf(22) = 2+11 = 13

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

**Created:** 30 April 2011

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