**Exercise**: Find an equation.

[solve for 'n'] 4 + 17 = n - 10 - 9

Note: This roadsign was submitted to RoadSignMath.com and they posted it to their website.

Date: Tue, 11 Oct 2005 20:16:46 -0500 From: RoadSignMath Administrator <admin@roadsignmath.com> To: Gerald D. Thurman <gthurman@gmail.com> Subject: Re: roadsign from Arizona Love the sign! And welcome to Road Sign Math! This will get posted in a couple of weeks, some other signs in front of you.## Update::2009.04.03

This BARS was selected to be one of the BARS of the Week for week #11 of the spring 2009 semester.

the numbers are: 4 17 9 40 10 previous math was: 4 + 17 + 9 + 10 = 40 more math: 40 / 10 + 4 + 9 = 17 rsPiEval: (40 + 4) / (log(10) * (17 - sqrt(9))) = Pi * 44/14 approximates Pi (3.14) rounded to nearest hundredth rsPhiEval: (log(10) + sqrt(40 / (17 - 9))) / sqrt(4) = Phi * Phi is the golden ratio and it approximates 1.61803399 rsAgeEval: 40 + 17 - 9 + sqrt(4) + log(10) = 51 * MathBabbler was 51 years young when he found this equation rsAgeEval: 17 * sqrt(9) + 40 / 10 - 4 = 51 * MathBabbler was 51 years young when he found this equation rsAgeEval: 40 + (17 + sqrt(9)) / 10 * 4 = 48 * RoadHacker was 48 years young when he found this road sign rs42Eval: 40 + 4 / (9 + 10 - 17) = 42 * 42 is the "Answer to Life, the Universe, and Everything" rsHwyEval: 17 * 9 + 40 / 10 - 4 = 153 * This road sign is on AZ Hwy-153 rsHwyEval: 17 * sqrt(9) * defactorial(4! / (40 / 10)) = 153 * This road sign is on AZ Hwy-153 rsHwyEval: 17 * sqrt(9) * (log(10) + sqrt(sqrt(40 - 4!))) = 153 * This road sign is on AZ Hwy-153 more math: (40 / (17 - 9)) - 4 = log(10) more math: sqrt(40 + 9) - 4 = cuberoot(17 + 10) more math: (sqrt(40 * 10) - 17) * sqrt(4) = sqrt(9)! [exercise] 17 * sqrt(9) * defactorial(4! / (40 / 10)) = 153 What does defactorial(4! / (40 / 10)) equal?## Update::2009.08.27

This BARS was selected to be one of the BARS of the Week for week #2 of the fall 2009 semester.

the numbers are: 4 17 9 40 10 rsAgeEval: 40 + 10 + (17 - 9) / 4 = 52 * MathBabbler was 52 years young when he found this equation. rsStateEval: 40 - 10 + (17 - 9) / 4 = 48 * Arizona was the 48th state admitted to the Union.

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

**Created:** 10 October 2005

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