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 
I think that Saint Petersburg shouldn’t be on here (since it’s 15 letters). And in the “50 hardest” West Bromwich is listed twice
for ‘Saint’ i went with ‘St’ for countries where that is the typical spelling (via the country’s census/Wikipedia/other references to the city) – so for US/Russia and a few others it is ‘St’ whereas French/etc it is ‘Saint’ and other countries may be something like ‘Sankt’.
okay, though I’m pretty sure St. is not a typical spelling in Russia (since Russian doesn’t even have a St. abbreviation)
How long are you going to continue with this series?
If the US series is anything to go by, 14 letters… then a Long Names one for everything beyond that.
yeah long names coming soon for the balance, maybe one more 13-letter one.