This road sign is on eastbound I-10 in Tucson, Arizona.

The road sign says...

+----------------------------+ | Orange Grove Rd 1/4 | | Sunset Rd 1 1/4 | | El Camino del Cerro | | Ruthrauff Rd 2 1/4 | +----------------------------+the numbers are: 1/4 (1 1/4) (2 1/4) the math is: sqrt(2 1/4) - 1/4 = 1 1/4 observe... 2 1/4 = (2 * 4 + 1) / 4 = 9/4 sqrt(2 1/4) = sqrt(9/4) = sqrt(9)/sqrt(4) = 3/2 3/2 - 1/4 = 6/4 - 1/4 = 5/4 = 1 1/4 increment-by-one math... 1/4 + 1 = 1 1/4 1 1/4 + 1 = 2 1/4 [solve for 'n'] sqrt(2 1/4) - 1/n = 1 1/4

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

**Created:** 02 October 2007

This work is licensed under a Creative Commons License.