Road Sign Math

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Dinosaur Math

September 23rd, 2005 · 2 Comments

Utah

Randy Weiss found this truly fascinating sign at the entrance of Dinosaur National Monument in Utah. Up to this point the math in our signs has been composed of mainly units in miles or road numbers, with an occasional exit number added for fun. This sign will have none of that. Instead, this sign brings dollars, years and days into it’s mathematical beauty! Randy captured this picture under close scrutiny from the park ranger, and recommends the Dinosaur Park to anyone that passes through the area — not just for this sign either!

With all the numbers being divisible by 5, it looks at first glance that this sign has a mathematical connection. With a second glance the 62 pops out, a burn job for sure. Then the third glance reveals the 7. After that, it all clicks together.

\matrix{62 - 7 + 20 = 65 + 50 + 10 - (5 \times 10)\cr \Downarrow\cr 55 + 20 = 125 - 50\cr \Downarrow\cr 75 = 75}

This sign is found on the right side of the road as you approach the ranger station to pay your fee. The GPS coordinates are approximately N40 26 16.7 W109 18 31.3. See sign on map!

Tags: Utah

2 responses so far ↓

  • 1 Sagebrush // Oct 28, 2005 at 11:46 am

    I remember that sign! 5 years ago I worked in the entrance station behind the sign. The rates have not gone up.

  • 2 gabrielle // Dec 11, 2005 at 11:52 am

    I want to know how dinosaurs use math can you please tell me

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