### BARS::Forcing a Basic Arithmetic Road Sign Using the "ceil" and "floor" Functions

These road signs were found on the Loop 101 looking north from Baseline Road.

This BARS will not be submitted to RoadSignMath.com (RSM) because the math for these signs contain deductions with respect to the RSM scoring system. For example, the following operations are frowned upon when doing road sign math.

```	a - a = 0     a x 1 = 1     a x 0 = 0     a / a = 1
```

In addition, RSM does not use the `ceil()` and `floor()` functions.

```   +-----------+  +----------+   +----------+
|           |  | Exit 55A |   | Exit 55B |
| 101 North |  | 60 West  |   | 60 East  |
|           |  | Phoenix  |   |  Globe   |
+-----------+  +----------+   +----------+

the numbers are:  101  55  60  55  60

the math is:

60 + 101(55 - 55) = 60

...or...

60 x 101(55 - 55) = 60

...or...

60 x log(sqrt(101 - 55 / 55)) = 60

...or...

60 x log(sqrt(101 - (55 - 55)!)) = 60

...or...

floor(sqrt(101)) = 60 + 60 - 55 - 55

evaluate left-hand side:
sqrt(101) = 10.05
floor(10.05) = 10

evaluate right-hand side:
60 - 55 + 60 - 55 = 10

...or...

ceil(sqrt(summation(55, 101) - (60 - 55)!)) = 60

60 - 55 = 5   and   5! = factorial(5) = 120
summation(55, 101) = 3666
3666 - 120 = 3546
sqrt(3546) = 59.548
ceil(59.548) = 60
```

Creator: Gerald D. Thurman [gthurman@gmail.com]
Created: 21 April 2006