### BARS::Sign Seen On The Great Food Truck Race

This road sign was seen while watching the Food Network's "The Great Food Truck Race."

The road sign says...

```   +------------------------+
| I-90   I-39  US Hwy-51 |
| Rockford       Chicago |
+------------------------+
```
```   the numbers are:  90  39  51

the math is:  90 = 39 + 51

rsCardinalityEval:  gcf(90, 39, 51) = 3
* There are three numbers in this sign.

rsPiRadiansEval:  (90 + 39 + 51)° = Pi radians
* 180 degrees = 3.14159265 radians

BARSfunc rsDupEval:  90 % 39 = 51 - dup(39)
* dup(n) = n       domain: all real numbers

* spf(n) = the sum of the prime factors of n
domain: n must be a composite number
* 90, 39, 51 are all composite numbers
* spf(90) = 2+3+3+5 = 13
* spf(39) = 3+13 = 16
* spf(51) = 3+17 = 20

BARSfunc rs37Eval:  90 - 51 - sqrt(sqrt(spf(39))) = 37
* Why rs37Eval? 37 Heaven @ http://thirty-seven.org

BARSfunc rs42:  90 - 51 + sqrt(sqrt(spf(39))) = 42-1
* 42 is the "Answer to Life, the Universe, and Everything"

BARSfunc off-by-one rsAgeEval: spf(90) + spf(39) + spf(51) = 58+1
* MathBabbler was 58 years young when he saw this sign.
Note: MathBabbler was closer to 59 than 58.
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 16 February 2016 