### Off-By-One Along AZ Hwy-387 in Arizona

This road sign is located along AZ Hwy-387.

```   +----------------------------------+
| Casa Grande Ruins Natl Mon    14 |
| Coolidge                      16 |
| Florence                      23 |
+----------------------------------+

the numbers are:  14  16  23

off-by-one:  sqrt(23 - 14) = sqrt(16) - 1

...or...

off-by-one:
23 / (14 / sqrt(sqrt(16))) = 23 / (14 / 2) = 23 / 7

(23 - 1) / 7 approximates Pi
```
##### Exercises
1. List the prime factors for the `number 387`.

2. Record the value of `22 / 7` to the nearest thousandth.

3. No or Yes. Casa Grande Ruins National Monument is `2 miles` from the town of Coolidge.

##### Updated::2013.03.10

RoadHacker is revisiting this spot for Pi Day 2013. This BARS was BARS number 101. On 10 March 2013 there were 769 BARS.

```   the numbers are:  14  16  23

rsCardinalityEval:  sqrt(23 - 14)! / sqrt(sqrt(16)) = 3
* There are 3 numbers in the road sign.

BARSfunc rsCardinalityEval:  sum_digits(23) + 14 - 16 = 3
* There are 3 numbers in the road sign.
* sum_digits(n) = sum the digits of n
domain:  n must be a prime number

BARSfunc off-by-one rsAgeEval:  14 + 16 + 23 = 53 - 1
* RoadHacker was 49 years young when he found this road sign.
He was 55 years young when he revisited the road sign.
* avg(49, 55) = 52
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 08 June 2006