This road sign was discovered while driving north on primed numbered Coconino County Road 3 during Spring Break 2006.

The road sign says...

+----------------------+ | <- V Bar V Ranch 1 | | <- Poor Farm 5 | | <- West Clear Cr. 9 | +----------------------+ | 81 | | <- | +------+the numbers are... 1 5 9 81 the math is: 1 + 5 + sqrt(9) = sqrt(81) observe... sqrt(9) = 3 sqrt(81) = 9 another calculation using three square roots: sqrt(sqrt(81)) + sqrt(9) - 5 = 1 observe... sqrt(sqrt(81)) = 3 sqrt(9) = 3 3 + 3 - 5 = 1 [exercise] Pretend the two V's are Roman numerals. Roman numeral V equals decimal number 5. The numbers now are: 1 5 5 5 8 91 Find a math equation without using (5 - 5).This road sign was submitted to RoadSignMath.com on 18 March 2006.

## RoadHacker Nanofoo

Pictures from Arizona...

{open road} {Artie Artichoke} {Pi mileage post} {martian friendly Flagstaff}

{Meteor City} { I-40 Winslow roadsign} {Artie Artichoke again}## Update::2009.04.17

This BARS was selected to be one of the BARS of the Week for week #13 of the spring 2009 semester.

the numbers are... 1 5 9 81 more math: cuberoot(81 / sqrt(9))! - 5 = 1 rsPhiEval: (1 + sqrt(5)) / (sqrt(9)! / sqrt(sqrt(81))) = Phi * Phi is the golden ratio and it approximates 1.61803399 rsAgeEval: 81 - (sqrt(9)! * 5) * 1 = 51 * MathBabbler was 51 years young when he found this equation rs42Eval: 5! - 81 + sqrt(9) * 1 = 42 * 42 is the "Answer to Life, the Universe, and Everything" rs42Eval: summation(5, 9) + sqrt(sqrt(81))! + 1 = 42 * summation(5, 9) = 5 + 6 + 7 + 8 + 9 = 35 rsHwyEval: 81 / 9 - 5 - 1 = 3 * This road sign is on Coconino County Road 3 rsHwyEval: cuberoot(81 - (9 * (5 + 1))) = 3

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

**Created:** 18 March 2006

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+ added the Roman numerals exercise
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