The object of this quiz is to adjust each circle's radius so it contains the target population shown at the right but ONLY within Europe. When you click Start you will be shown a marker on a random populated Europe grid square (there are over 90K 10x10 km grid squares used for the data, courtesy of https://human-settlement.emergency.copernicus.eu/index.php). Also you will see an adjustable circle of radius 100 km to start. Adjust the circle's radius by dragging it until it contains the target number of people shown - this target will be between 5 and 100 million people. Then click submit. You are scored on how close your circle's population is to the target.
PLEASE NOTE: ALL of Turkey is included in counting population (not just European portion), and the portion of Russia west of 61.5 degrees E (just east of Chelyabinsk). Nothing outside Europe (such as Africa or middle east other than Turkey) is included toward the population count within a circle.
Quiz Takers 
Updated with the new 1K+ Europe cities data set so there will be more cities on some of the options now.
maybe its me but the percentage counter seems off (15 top cities +germany+uk only gives 5%) and the ‘finished country counter’ stays on 0.
I see Arnavutköy showing up in the European quizzes now. Isn’t that part of Istanbul?
Per citypopulation.de it is considered a separate city.
Huh, well that’s new. Feels like an error based on information elsewhere online, but can’t argue with the source 🙂
Though I do wonder what they mean by “The 2017 and 2022 population figures of cities in municipal provinces are calculated summarizing the population of selected neighborhoods.” – Makes it sound like citypop.de calculated the results on their own.
And sorry for the delayed response. I finally figured out how to find my past comments on this site. Only took me ten years 😛
One minor issue: the Top Cities counter has a bug as I suddenly jumped to 344 on a 130 cities quiz. And a minor detail… didn’t Kosovo use to have a border?
if you can recreate the Top Cities bug let me know what city you typed in to jump to 344 – i’m not seeing anything wrong. Kosovo doesn’t have an outline for itself on the quizzes where you can zoom in all the way.
Some of the smaller countries don’t show up in the list at the bottom, and they didn’t seem to update in the city counter right away. Also, some of the Belgian cities, such as Antwerp, don’t look like they have the correct coordinates. I really like this quiz and the US version; don’t know how I missed them before now. Would be cool to have a World version plus ones for other continents too.
ah I know the issue…ill fix those things later on tonight.
ok added Malta and Andorra’s entries in the bottom rows. Belgium is fixed.
Weird. For the top 3 cities, my counter stopped at 113, but my score was nonetheless correctly saved with 116.
i’m going to remove the stats feature til i can get it working properly for this and the us version.
Why are the shapes of Lebanon, West Bank and Gaza included when they aren’t in Europe? And something is definitely up with the 50 hardest and 50 missed and the percentages. For example, I fail to believe 93.33% of people knew Vlore yet only 86.66% got Amsterdam.
For some reason, the outlines of the countries you mentioned are always included in the Europe quizzes. The statistics issue is weird though. Never heard of Vlore 🙂
On the other hand, Kosovo’s borders aren’t there. I think you gotta ask Mapquest about it. The 50 hardest/missed lists are definitely broken.
There’s something up with the “50 missed” and “50 hardest” on this one – “50 missed” only shows me ones which I DID get, and “50 hardest” mixes up some of the ones I did get with some which I didn’t.
Same issue here.