These railroad signs are at Union Station in Kansas City, Missouri.

The railroad signs say...

+------------+ +------------+ | Track 30 | | Track 29 | | Location 3 | | Location 3 | +------------+ +------------+the numbers are: 30 29 3 3 --- these equations were found on the train --- the math is: 30 - 3 / 3 = 29 rsAgeEval: 30 + 29 - 3 / 3 = 58 * MathBabbler was 58 years young when he found these signs. rs42Eval: 29 + 30 / 3 + 3 = 42 * 42 is the "Answer to Life, the Universe, and Everything" rsCardinalityEval: (30 - 29 + 3)! / 3! = 4 * There are four numbers in these signs. off-by-one rs37Eval: 29 + 30 / 3 - 3 = 37-1 * Whyrs37Eval? 37 Heaven @ http://thirty-seven.org --- equations found after the train ride --- rsStateEval: ((30 - 29) + 3)! / 3! = 4 * There are four numbers in these signs. rsStateEval: (((30 - 29) + 3)! / 3!)! = 24 rsStateEval: 30! / 29! - 3 - 3 = 24 * Missouri was the 24th state admitted to the Union. BARSfunc rs42eval: 30 + sum_digits(29) + 3 / 3 = 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 * 29 is prime; sum_digits(29) = 2+9 = 11 * 30 + 11 + 3 / 3 = 42 BARSfunc rs42eval: 30 + mult_digits(29) - 3 - 3 = 42 * 42 is the "Answer to Life, the Universe, and Everything" * mult_digits(n) = product of the digits of n domain: n must be a prime number * 29 is prime; mult_digits(29) = 2*9 = 18 * 30 + 18 - 3 - 3 = 42 BARSfunc off-by-one rsAgeEval: reverse_digits(29) - 30 - 3! + 3 = 58+1 * MathBabbler was 58 years young when he found these signs. * Note: MathBabbler was older than 58 1/2. This would not have been an off-by-one if found four months later.Back in July of 2010 MathBabbler thought Kansas City Union Station was in Kansas. {BARS::Railroad Track Signs in Kansas City, Kansas}

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

**Created:** 12 January 2016

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