The object of this quiz is to click on the circle containing the largest population within Europe. When you begin you'll be shown 2 circles with radii between 50 and 250 km on the map which do not intersect. Click on the one with the larger Europe population within it (based Europe population density info) then 'Submit' - if you are correct you'll move on. One incorrect round and the quiz is over. Every 5 rounds the number of circles on the map will increase by 1. Try to build the longest streak of correct circles. Circles displayed will always be non-intersecting.
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 
doesn’t make sense that some multi word cities are included if the first part is 5 letters and some aren’t
for example Torre del Greco included but Torre Annunziata isn’t
Gioia del Colle is included but Gioia Tauro isn’tRosny-sous-Bois included but Livry-Gargan isn’t etc.
I have adjusted these – they are based on the full name and I had some computing total letters off the partial shortened name. But for some cities very often referred to using a shortened name (like Frankfurt) I go with the shortened, common name.
these were just 3 examples there are dozens of others too (like in France every city that’s “sur” or “en” something)
it’s a good thing that we don’t have to type full names in general but they shouldn’t appear on quizzes like these which ask for an exact amount of letters
for some reason the markers for Halle, Essen, and Lille aren’t disappearing (even tho they’re counted into the stats)
fixing this now – thanks.