This road sign is on Castle Hot Springs Road in Arizona. MathBabbler found this road sign while reading the Arizona Republic on 6 April 2013 and his picture of the road is a picture of a picture.

The road sign says...

+-----------------------------+ | <- Castle Hot Springs Rd -> | | <- State Route 74 16 Mi | | <- Lake Pleasant 10 Mi | | Morristown 21 Mi -> | +-----------------------------+the numbers are: 74 16 10 21 rsPiEval: (74 - 10 + sqrt(sqrt(16))) / 21 ~= Pi * 66/21 approximates Pi rounded to nearest hundredth (3.14) * 3.1415926535897932384626 rs37Eval: 21 % 10 * (74 / sqrt(sqrt(16))) = 37 * Whyrs37Eval? 37 Heaven @ http://thirty-seven.org rs42Eval: log(74 + 16 + 10) * 21 = 42 * 42 is the "Answer to Life, the Universe, and Everything" rs42Eval: cuberoot(sqrt(74 - 10)) * 21 = 42 * 42 is the "Answer to Life, the Universe, and Everything" number system rs42Eval: 74 - 21_{16}+ log(10) = 42 * 42 is the "Answer to Life, the Universe, and Everything" rsAgeEval: 74 - 21 + log(10) * sqrt(sqrt(16)) = 55 * MathBabbler was 55 years young when he created this BARS. BARSfunc math: reverse_digits(16 + 10 + 21) = 74 * reverse_digits(n) = the digits of n reversed domain: n must be a prime number * 47 is prime; reverse_digits(16 + 10 + 21) = 74 off-by-one rsStateEval: 74 - 21 + 10 - 16 = 48-1 * Arizona was the 48th state admitted to the Union.

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

**Created:** 06 April 2013

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