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 
“50 Missed” doesn’t display missed answers. It seems to show random correct answers.
Yeah for some of these municipalities quizzes where size isn’t factored into the quiz it will do that.
Why cant u type inn fullscreen-version? Would be a great quizz if that was possible
Yeah it’s cause of how Google Maps works, can’t show anything but the map. You’ll just have to maximize your browser window instead.
Added the new 357th municipality of Norway – border is not exactly correct but is close 🙂