These street signs are in Bisbee, Arizona.

The street signs say...

+---------------------+ | Speed Limit 5 | ----------------------- | Speed Limit 15 | ----------------------- | Weight Limit 4 Tons | +---------------------+the numbers are: 4 5 15 the math is: cuberoot(5! / 15) = sqrt(4) rsStateEval: 4! * cuberoot(5! / 15) = 48 * Arizona was the 48th state admitted to the Union. rsCardinalityEval: 15 / (5! / 4!) = 3 rsCardinalityEval: 4 - log(15 - 5) = 3 rsCardinalityEval: (15 / 5)! / sqrt(4) = 3 * There are 3 numbers in these signs. BARSfunc rs37Eval: spf(15) * 4 + 5 = 37 * Whyrs37Eval? 37 Heaven @ http://thirty-seven.org * spf(n) = the sum of the prime factors of n domain: n must be a composite number * spf(15) = 3+5 = 8 BARSfunc rs42Eval: spf(15) * 5 + sqrt(4) = 42 * 42 is the "Answer to Life, the Universe, and Everything" off-by-one rsStateEval: sqrt(4)^5 + 15 = 48 - 1 * Arizona was the 48th state admitted to the Union.

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

**Created:** 22 March 2015 (posted 23 March 2015)

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