Road Sign MathGet the app

A road trip game

Find a sign. Make the math true.

Spot a road sign with numbers on it, then use those numbers to write something true. These are the signs players have found. Tap a pin to see them.

signs
16
players
3
states
6

Who’s playing

All 162025 · 32023 · 82021 · 5
Map of the United States with a pin for each place a sign was found2252

On the way to the Burlington airport, Vermont · 1 sign

Not on the map: Gross Vehicle Weight (Along I-80/I-90 East).

Latest signs

Newest first. Every sign posted from the app shows up here.

How to play

  1. Spot a sign

    Any sign with numbers: exits, miles, speed limits, route numbers. The passenger takes the photo.

  2. Make it true

    Use the numbers with any math you like. It just has to be true. 12 + 1 = 13 is as good as a square root.

  3. Put it on the map

    Your sign shows up here and in the app. Anyone who sees it can find another way to make it work.

There are no points. The fun is in the finding.

The game lives in the app

Everything on this site is in the iPhone app, plus the camera. Point it at a sign, check the numbers it reads, write your math, and post it to the map. Sign in with your email. There’s no password.

  • Passenger mode: the camera boxes every number it can read.
  • A math keypad with square roots and stacked fractions, and a live “It works”.
  • Badges for the road: your first sign, new states, mile markers, and a few secrets.
Road Sign Math for iPhoneIn testing now. The link to try it goes here when it opens up.