First, choose any state by entering its abbreviation – i.e. ‘CA’ – you will then be presented with a 5×5 table of random cities among the top 100 in that state (may be under 25 cities if less than that exist in that state). The object of the quiz is to pair up cities two at a time which have the shortest distance between them. Any cities with the same name in a state were left out of this quiz to avoid confusion.

Single click on a city’s text and it will highlight red. To choose the other city of the pair click another city’s text. Also, you can re-click on the first city to deselect it. The distance between them will be shown and you will get up to 100 points. 100 points corresponds to the closest pair of cities, 0 points to the farthest apart pair – scores decrease based on the distance of your two cities related to the possible range of distances. Those two cities will then be replaced with their score and you will now choose the closest pair of cities from the remaining 23 cities which have been adjusted to have 100 and 0 corresponding to the closest/farthest pairs among those 23, and so on until you run out of time or complete all pairs of cities leaving only 1 or 2 left.

You get a 100 point bonus for completing all pairs within 5 minutes.