MathBabbler drove past the road sign for this BAB without taking a picture. On a return visit, while riding shotgun, he took a picture that ended up catching the bottom right-hand corner of the sign. On yet another return visit -- again while riding shotgun -- the partial picture currently being used in this BAB was obtained. RoadHacker is optimistic he will eventually get a good picture of the HOV Exit 144 road sign.

This blurred and partial road sign is for a HOV exit on eastbound I-10 in central Phoenix, Arizona.

`[update::2007.11.04]`

RoadHacker got this Exit 144 picture while returning home from the DARPA Urban Challenge.The road sign says...

+----------+ | Exit 144 | | 5th Ave | | 3rd Ave | | 1 Mile | +----------+the numbers are: 144 5 3 1 the math is: sqrt(144) = 3 * (5 - 1) observe... Phi = 1.61803399 sqrt(5) = 2.23606798 sqrt(144) = 12 12 / 3 = 4 sqrt(4) = 2 phi math: (1 + sqrt(5)) / sqrt(sqrt(144) / 3) = Phi rsHwyEval: sqrt(144) / 3 + 5 + 1 = 10 * this highway sign is on I-10 rs42Eval: sqrt(144) * 3 + 5 + 1 = 42 * the "Answer to Life, the Universe, and Everything" factorial math: 144 - 5! = (3 + 1)! [solve for 'n'] sqrt(144) = 3(5 - n) [solve for 'x'] (1 + sqrt(5)) / sqrt(sqrt(144) / x) = 1.61803399## Update::2013.10.26

I displayed this BARS during class and a student found the the following equation.

5 + 3 + 1 = 1 + 4 + 4The BARS function library includes a

`function; however, the domain of the`

sum_digits(n)`is restricted to prime numbers only. As a result of this student's equationeering, the domain of`

sum_digits(n)`has been modified to include numbers that have whole number roots.`

sum_digits(n)the numbers are: 144 5 3 1 the math is: 5 + 3 + 1 = sum_digits(144) * sum_digits(n) = sum the digits of n domain: n must either a prime number or have a whole number root

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

**Created:** 24 March 2007

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