### BARS::Pi Sign Found Eight Miles South of Hannibal, Missouri

This road sign was found eight miles south of Hannibal, Missouri, on MO Hwy-79.

```   +--------------------------+
| Hannibal               8 |
| Saverton            1 -> |
| Lock & Dam No. 22   2 -> |
+--------------------------+
```
```   the numbers are:  8  1  2  22

the math is:  22 / (8 + 1 - 2) = Pi (3.14)

[solve for 'n']  22 / (n + 1 - 2) = Pi (3.14)

more math:  22 / (sqrt(8^2) - 1) = Pi (3.14)

off-by-one math:  (8 / 2)! - 1 = 22 (+ 1)
```

On 1 July 2006, RoadSignMath.com (RSM) did not have any road signs from Missouri. This sign was submitted to RSM on 27 August 2006.

##### Update::2006.11.25

I was notified by RSM that this road sign was no longer valid because of a rule change related to signs that evaluate to mathematical constants such as Pi.

```   "3) The solution must match exactly for all decimals returned
in the equation. You cannot truncate any decimals."
```

The equation `(22 / (8 + 1 - 2))` evaluates to `3.142857`. Pi to six decimal digits is `3.141592`. In a nutshell, RoadSignMath.com will not accept road signs that use `(22 / 7)` to approximate Pi.

##### Update::2009.04.09

This BARS was selected to be one of the BARS of the Week for week #12 of the spring 2009 semester.

```   the numbers are:  8  1  2  22

rsAgeEval:  2 * 22 + 8 - 1 = 51
* MathBabbler was 51 years young when he found this equation

rs42Eval:  2 * 22 - (1 * cuberoot(8)) = 42
* 42 is the "Answer to Life, the Universe, and Everything"

off-by-one rsAgeEval:  2 * 22 + sqrt(8 + 1)! = 49+1
* RoadHacker was 49 years young when he found this road sign
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 01 July 2006 