This bridge sign is located along old US Hwy-80 that connects Tonopah with Gila Bend. { the bridge} {the bridge}

The sign says...

+---------------------------+ | B R I D G E | | height clearance 13' 6'' | | width clearance 18' | | maximum weight 40,000 lbs | +---------------------------+the numbers are: 13 6 18 40,000 the math is: sqrt(sqrt(40000)) - (18 - 13 + 6) = Pi (3.14) observe... sqrt(40,000) = 200 sqrt(200) = 14.1421356 - (18 - 13 + 6) = 11.0000000 ----------------------------- 3.1421356 Pi = 3.14159265 [solve for 'n'] sqrt(sqrt(40000)) - (18 - n + 6) = Pi (3.14)## About BARs Analysis

The square root function is handy for reducing large numbers into smaller numbers. MathBabbler adopted RoadSignMath.com's policy of allowing square root without requiring a two.

The square root of

`40,000`

was clear, but we were unable to work with the resulting`200`

. Out of curiosity we did a square root of`200`

and noticed the`.14`

in the result. We observed that if`11`

could be subtracted from`14`

, we'd have an approximation of Pi. It didn't take long to get the remaining three numbers to evaluate to`11`

.

**Creator:** Gerald D. Thurman
[gthurman@gmail.com]

**Created:** 13 March 2006

This work is licensed under a Creative Commons Attribution 3.0 United States License.