The object of this quiz is to place 20 circles of radius 100 miles on the map so that they contain the largest total population.
When you begin you'll be given a 100-mile radius circle centered on the map. Move it using the mouse and click SUBMIT. You will be given a score for that circle corresponding to the total population among all US census tracts within it (there are about 85K total US census tracts averaging about 4K people each). Try to complete all 20 circles with the highest total score.
Any INTERSECTING areas are only counted one time, so no census tract will be counted more than once.
Quiz Takers 
Should not Boise City be on here?
The one in Idaho I mean.
I don’t think there currently is a city named “Boise City” – there’s just “Boise” Idaho.
I’m not positive what the official name is, but my understanding is it is officially Boise City, Idaho. The city itself interchangeably refers to itself as the City of Boise (which would not count) and Boise City. The city code is specifically called the “City Code of Boise City.” The mayor’s Covid-19 public health orders have all been issued by the “Mayor of the city of Boise City.” The census designates it as Boise City, but that may be to distinguish it from Boise County.
I refer to it as Boise in all my quizzes. Even the city’s official website just says Boise so I will leave it as that.
Oklahoma’s seems to use the word City:
https://en.wikipedia.org/wiki/Boise_City,_Oklahoma
I so badly wanted “New Jack” to be a bonus answer.
No New York?
the city’s name is ‘New York’ – city is only added to distinguish it from the state…officially it is ‘City of New York’