First choose any US city by entering it and choosing it in the drop-down box. Then, name ANY US city in each 25 mile circle/ring as the rings expand outward from your city of choice. The first circle will include your city of choice as a possible answer.

When you run out of time or end the quiz, you will see the current ring’s largest correct answer at right (under ‘Answer Stats’ by your coordinates).

For example, if you choose ‘Chicago’ – you will be shown a circle of radius 25 miles centered at Chicago. Naming any city in this circle (including Chicago) will cause another ‘ring’ of radius 25 miles to appear outside that circle. You now need to name any US city in that ring (but not within any previous circles/rings). If a city is not within the next ring of that distance, the ring will keep expanding by that distance until a city falls within it. So if a city doesn’t fall within 25-50 miles, it will expand to be a 25-75 mile ring, then 25-100 miles and so on until a qualifying city is found within the ring.

Want to name the largest city in each ring?
US 25 Mile Expanding Circles Challenge – Choose City