First choose any Asia 50K+ city by entering it and choosing it in the drop-down box. Then, name the largest 50K+ Asia city in each 100km 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 if it is the largest 50K+ city in that area.

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

For example, if you choose ‘Beijing, China’ – you will be shown a circle of radius 100km centered at Beijing. Naming the largest city in this circle (Beijing in this case) will cause another ‘ring’ of radius 100km to appear outside that circle. You now need to name the largest 50K+ Asian 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 100-200km, it will expand to be a 100-300km ring, then 100-400km and so on until a qualifying city is found within the ring.

Try other continents:
Africa 50 Km Expanding Circles Challenge – Choose City | Europe 50 Km Expanding Circles Any City Challenge – Choose City
North America 50 Km Expanding Circles Challenge – Choose City | South America 50 Km Expanding Circles Challenge – Choose City