This pet sign is in an alley near Optimist Park in Tempe, Arizona.

The pet sign says...

```+------------------+
|  Clean Up After  |
|   TCC SEC 6-30   |
|   TCC SEC 6-31   |
+------------------+
```
```   the numbers are:  31  30  6  6

the math is: 30 + 6 / 6 = 31
more math:  30 / 6 = sqrt(31 - 6)

rsAgeEval:  31 + 30 - 6 / 6 = 60
off-by-one rsAgeEval:  6! / 30 + 31 + 6 = 60+1
* TempeHiker was 60 years young when he found this sign.
* TempeHiker was closer to 61 than 60 when he found this sign.

rs42Eval:  6 * (6 + 31 - 30) = 42
rs42Eval:  6 * (6 + 31! / 30!) = 42
off-by-one rs42Eval:  sqrt(31 - 6) + 30 + 6 = 42-1
off-by-one rs42Eval:  sqrt(30 + 6) + 31 + 6 = 42+1
* 42 is the "Answer to Life, the Universe, and Everything"

rs37Eval:  31 + 6 + 30 % 6 = 37
rs37Eval:  30 + 6 + 31 % 6 = 37
* Why rs37Eval? 37 Heaven @ http://thirty-seven.org

rsCardinalityEval:  30 / 6 - 31 % 6 = 4
rsCardinalityEval:  6 - sqrt(sqrt(31 - 6)! / 30) = 4
* There are four numbers in this sign.

BARSfunc rs42Eval:  31 + 6 + 6 - log(spf(30)) = 42
BARSfunc rs42Eval:  31 + spf(6) + spf(6) + log(spf(30)) = 42
BARSfunc rs42Eval:  reverse_digits(31) + 30 - 6 / 6 = 42
* 42 is the "Answer to Life, the Universe, and Everything"
* spf(n) = the sum of the prime factors of n
domain: n must be a composite number
* 30 is composite; spf(30) = 2+3+5 = 10
* 6 is composite; spf(6) = 2+3 = 5
* reverse_digits(n) = the digits of n reversed
domain:  n must be a prime number
* 31 is prime; reverse_digits(31) = 13
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 02 March 2018 