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 
I couldn’t see 10 missed properly: just one of the 10 showed up for me.
The same happened to me on the Spain Places Most Common Words quiz.
should be good now.
Hansestadt? It’s in the official name of at least 10 cities in Northern Germany that I can think of off the top of my head…..
i used the city names as pulled from the Germany census data – in some cases these are not the long full and official names of the cities.
Indeed, same in Europe
you mean the Spain one…these have both been fixed.
The scores don’t seem to work.