This road sign is along AZ Hwy-78 in the Apache National Forest in Arizona.

The road sign says...

+----------------------------+ | Forest Road 212 | | Bear Track Camp 2.8 Mi. | | Forest Road 215 10.2 Mi. | | Hwy. 191 31.1 Mi. | +----------------------------+the numbers are: 212 2.8 215 10.2 191 31.1 ceil(2.8) = 3 [round up to nearest integer] floor(10.2) = 10 [round down to nearest integer] floor(31.1) = 31 [round down to nearest integer] the numbers become: 212 3 215 10 191 31 the math is: sqrt(31 - sqrt(212 + 3 + 10))! + 191 = 215 observe... 212 + 3 + 10 = 225 sqrt(225) = 15 31 - 15 = 16 sqrt(16) = 4 4! = 24 191 + 24 = 215Note: This road sign was discovered on Pi Day 2008.

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

**Created:** 18 March 2008

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