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World 100 Km Expanding Circles Challenge – Choose City
DirectionsFirst choose any World 50K+ city by entering it and choosing it in the drop-down box. Then, name the largest World 50K+ 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 ‘Paris, France’ – you will be shown a circle of radius 100km centered at Paris. Naming the largest city in this circle (Paris in this case) will cause another ‘ring’ of radius 100km to appear outside that circle. You now need to name the largest World 50K+ 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 200-300km, it will expand to be a 200-400km ring, then 200-500km and so on until a qualifying city is found within the ring.
Quiz Takers 
Apparently La Paz, San Salvador, Muscat, and others are smaller than their suburbs, which after doing some research is false
Based on city proper populations from citypopulation.de they are much smaller than people think.
Great Quiz, definitley one of my favorites, but some of the cities are definitley wrong. Like, I was on the Innsbruck round, and city 9800-9900 should 100% be Mexico, right, but instead the right answer is given to be this random suburb of the city “Ectapec de Morelos”
Such a stupid bug to lose to
All populations are based on city proper per citypopulation.de – I don’t know what city you thought was larger? But the one in Mexico was a city whose population was the largest for that round.
The time on this quiz (and others too) is so short that it’s completely impossible to finish even doing it in two goes after taking notes of the first 80 cities. I think it detracts from the experience. All top scores in the leaderboard not only must be using Maps apps but literally taking notes of all 201 cities and then spam-typing them because there is no physical way to have time to actually search throughout the coloured rings!
There are time bonuses for every 25 cities from 25 thru 100 I believe.
It’s still ridiculously short, there’s no physical way even knowing all cities to go through all.
How many/which cities have 201 circles? I’ve only found Bandar Lampung and La Dorada.
There is also Arica/Tacna (Chile/Peru) and Sanya (Hainan, China)
I’ve writtend down every single major city inside of the circle and nothing happens
You are only naming the largest city within each ring that appears, staring with the first circle. Only the largest will be accepted.