### BARS::25 Miles South of St. Johns on US Hwy-191 in Arizona

This road sign is on northbound US Hwy-191/US Hwy-180 in Arizona.

The road sign says...

```   +-------------------+
| St. Johns      25 |
| Sanders        78 |
| Holbrook       88 |
+-------------------+
```
```   the numbers are:  25  78  88

the rsHwyEval is:  25 + 78 + 88 = 191
* this road sign is on US Hwy-191

off-by-one rsAgeEval:  sqrt(25) * (88 - 78) = 50
* RoadHacker was 50+1 years young when found this sign
```

The road sign is encountered immediately after turning north onto US Hwy-191 from US Hwy-60. This stretch of US Hwy-191 is also US Hwy-180. Bablylonians used the base-60 (hexasegimal) number system.

```   the numbers are:  25  78  88

2nd rsHwyEval is:  sqrt(25)! + (88 - 78)60 = 180
* this road sign is on US Hwy-180

observe...
sqrt(25) = 5
5! = 5 * 4 * 3 * 2 * 1 = 120
88 - 78 = 10
10 in base-60 is 60
```

The base-5 (quinary) number system is often called the "Hand" number system.

```   the numbers are:  25  78  88

the base-5 math is:  sqrt(25) = (88 - 78)5

observe...
10 in base-5 is 5
```
##### Update::2010.01.29

This BARS was selected to be one of the BARS of the Week for week #3 of the spring 2010 semester.

```   the numbers are:  25  78  88

off-by-one rsTweetLenEval:  88 + 78 - 25 = 140 + 1
* 140 is the maximum length of a Twitter posting (tweet).

78, 88, 25 are composite numbers; therefore, they are all in
the domain (i.e. can be used as input to) the spf(n) function.

BARSfunc math:  spf(78) - spf(88) = log(spf(25))
* spf(n) = the sum of the prime factors of n
* spf(78) = 2+3+13 = 18; spf(88) = 2+2+2+11 = 17; spf(25) = 5+5 = 10
* 18 - 17 = 10; log(10) = 1   [log(n) defaults to base-10]
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 29 September 2008 