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 changed this to remove Frankfurt – it will be under its full name in a quiz for 15 letters.
Newcastle? also please accept Genichesk
This series of quizzes uses the full official name for cities, so it’s Newcastle upon Tyne. Same for Stoke and Hull for instance.
yeah i tend to use full city names for counting letters…will add that alternative.
then why do you use Frankfurt and not Frankfurt am Main
If you have Newcastle as an alternative won’t the city appear in two quizzes, this one and the one with more letters? I’ve seen quizzes with Frankfurt and Frankfurt am Main but with such an amount of quizzes one can excuse a bit of inconsistency here and there.