### BARS::Highway Signs on US Hwy-30 in Downtown Joliet, Illinois

These highway signs are on US Hwy-30 in downtown Joliet, Illinois.

The highway signs say...

```   +-----------+
|   I-80    |
-------------
| US  Hwy-6 |
-------------
| IL Hwy-53 |
+-----------+
```
```   the numbers are:  80  6  53

the math is:  cuberoot(80 - 53)! = 6

BARSfunc rsHwyEval:  80 - 53 + defactorial(6) = 30
* These highway signs are on US Hwy-30.

off-by-one rsAgeEval:  53 + 80 % 6 = 54+1
* RoadHacker was 54 years young when he found these highway signs.

...playground...

spf(80) = 2+2+2+2+5 = 13; spf(6) = 5
* spf(n) = the sum of the prime factors of n

53 is a prime number

* sum_digits(53) = 8; mult_digits(53) = 15; reverse_digits(53) = 35
* sum_digits(n) = sum the digits of n
* mult_digits(n) = product of the digits of n
* reverse_digits(n) = the digits of n reversed
* domain:  n must be a prime number

BARSfunc math:  spf(80) - spf(6) = sum_digits(53)
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 19 August 2011