This road sign is on eastbound US Hwy-70 in Arizona. The road sign picture was taken on Pi Day 2008.

The road sign says...

+-----------------+ | San Carlos 17 | | Safford 74 | +-----------------+the numbers are: 17 74 split_into_squares_sum(74) = { 25, 49 } the numbers become: 17 25 49 Pi math: (17 + sqrt(25)) / sqrt(49) = Pi (3.14) observe... sqrt(25) = 5 17 + 5 = 22 sqrt(49) = 7 22 / 7 = 3.14285714 Pi = 3.14159265 off-by-one math: 25 - 17 = sqrt(49) + 1 sum_prime_number_digits(17) = 8 split_into_squares_sum(8) = { 4, 4 } the numbers become: 4 4 25 49 the math is: (sqrt(4) + sqrt(4))! = 49 - 25 observe... sqrt(4) = 2 2 + 2 = 4 4! = 24 [4 * 3 * 2 * 1]Note: This road sign was photographed on Pi Day 2008.

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

**Created:** 30 April 2008

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