Road Sign Math

It’s nice to see the site back up and running. I discovered this right as it went dormant and have been eager to participate. These signs are found on Cedar Street in Millville, New Jersey just as one pulls into Lakeside Middle School. Zoom of the bottom part of this sign shows an extensive array [...]

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This gantry is found over I-405 southbound, just south of downtown Bellevue, WA. Two signs, and the one on the left has just barely visible numbers 2, 5 and 7. 12 = 8 + (7 – 5 ) + 2

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Todd Southworth brings this huge sign assemblage from Pomona, California. Mr. Southworth freely admits that he shot this photo and figured the math out later. This solution wasn’t an epiphany while going down the road at 70 miles an hour. He noticed the 71 + 10 first, realizing that was 81 which is easily 9 [...]

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Samer Adra storms onto the scene with his first sign from California. The math works out nicely via this solution. 64 \div 32 = \sqrt{\sqrt{16}} Samer had originally submitted this sign as a sequence sign, however, we couldn’t justify it. The sequence would have been…. 2^4, 2^5, 2^6 This sign is on on I-80 heading [...]

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Geoff Hazel sends this very grainy, barely legible, but certified photo of a nice simple sign assemblage in Bellevue, Washington. Umpty dump… 17 + 1 = 18 This sign is at exit 17 on I-90 in Bellevue, Washington. See sign on map!

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Steven Francis recently discovered Road Sign Math and has been searching for valid signs since, and found this one to send in for his first winner. Mr. Francis is a math teacher, so buckle your seat belts fans, it’s going to get a little crazy. Mr. Francis submits this formula as the winner for the [...]

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Mark Peal sends this sign from ski country in Vermont. The words are clear enough, but additionally the arrows let you know that everything is uphill from here. Mr. Peal brings it all together in a straightforward manner. \sqrt{16} \times 4 = 5 + 6 + 5 This sign is in the Irasville neighborhood of [...]

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H.B. Elkins ticks off another state in the chase to put all 50 states on the map. This one is a squeker, almost in Arkansas but landing on the Missouri side. Some quick math from the bottom up with a square root gets this one in the door. \sqrt{25 – 9} = 4 This sign [...]

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Geoff Hazel puts Washington on the board with this sign assembly that is overloaded with a variety of 13s! There are less than 10 states remaining to be posted in Road Sign Math. Some nice mathematics here from Mr. Hazel. If you are having a hard time seeing the 35, it is in the small [...]

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Robert Lee, a first-timer to the wonderful game of mathematically significant road signs puts Mississippi on the map with this great winner from Pontotoc, Mississippi. This is one of those great signs that just reaches out and smacks you in the head with it’s mathematical elegance. 9 + 6 = 15 This sign is on [...]

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