This road sign is on southbound AZ Hwy-77 (at its junction with AZ Hwy-79) in Arizona. The picture was taken on 15 March 2013 as part of MathBabber's Pi Day 2013 road trip.

The road sign says...

+----------------+ | Catalina 4 | | Oro Valley 11 | | Tucson 25 | +----------------+the numbers are: 4 11 25 number system math: 11_{4}= sqrt(25) rsPiEval: (sqrt(11 + 25)! / 4) degrees = Pi radians * pi = 3.1415926535897932384626+ rsCardinalityEval: 25 - 11 * sqrt(4) = 3 * This road sign has three numbers. rsCardinalityEval: sqrt(11 + 25) / sqrt(4) = 3 * This road sign has three numbers. rsAgeEval: sqrt(11 * sqrt(25))^sqrt(4) = 55 * RoadHacker was 55 years young when he found this road sign. off-by-one rsStateEval: sqrt(4) * 11 + 25 = 48-1 * Arizona was the 48th state admitted to the Union. BARSfunc rsStateEval: sqrt(4) * 25 - sum_digits(11) = 48 * Arizona was the 48th state admitted to the Union. * sum_digits(n) = sum the digits of n domain: n must be a prime number * 11 is prime; sum_digits(11) = 1+1 = 2 BARSfunc math: log(25 * 4) = sum_digits(11) BARSfunc math: sqrt(25) - 4 = mult_digits(11) * mult_digits(n) = product of the digits of n domain: n must be a prime number * 11 is prime; mult_digits(11) = 1*1 = 1 BARSfunc math: log(sqrt(25 * 4)) = mult_digits(11) This road sign is on AZ Hwy-77 and to date norsHwyEvalhas been found. RoadHacker encountered this road sign after turning left on AZ Hwy-79 onto southbound AZ Hwy-77. pseudo-rsHwyEval: 4! + 11 * sqrt(25) = 79This road sign resulted in the creation of the

PrimeAndSquareRScategorization.PrimeAndSquareRS: 11 is a prime number; 4 & 25 are square numbers

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

**Created:** 22 March 2013

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