This road sign is on eastbound I-8 in California.

The road sign says...

+-----------------+ | Ocotillo 13 | | El Centro 42 | +-----------------+the numbers are: 13 42 rsAgeEval: 13 + 42 = 55 * RoadHacker was 55 years young when he found this road sign. off-by-one rsCardinalityEval: 42 % 13 = 2+1 * There are two numbers in this road sign. BARSfunc rs42Eval: sqrt(42^sqrt(sum_digits(13))) = 42 * 42 is the "Answer to Life, the Universe, and Everything" * sum_digits(n) = sum the digits of n domain: n must be a prime number * 13 is a prime number; sum_digits(13) = 4 BARSfunc off-by-one math: spf(42) = 13-1 * spf(n) = the sum of the prime factors of n domain: n must be composite number * 42 is a composite number; spf(42) = 2+3+7 = 12This road sign was used as an example of a

rsAgeEval.

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

**Created:** 11 July 2012

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