First choose the number of cities by typing ‘100’, ‘250’, '500', '1k' or 'all' – then try to achieve the highest population among the largest English cities (min 500 population) you chose. Quiz is not timed.
hugequiz Premium users have the option to choose any number of cities to play the quiz with (stats are processed but score isn't saved). Simply enter #(number of cities)# to play the quiz with any number of cities from 25 to the maximum. For example, to play the 300 largest cities, type #300# to begin the quiz and you will play it with the 300 largest cities. Entering #all# will play it with all cities - all cities will also be chosen for any number chosen above the total.
Quiz Takers 
would be better if it was exclusively 4 letter cities, there’s still a bunch of stuff like Pont du Chateau or Usti nad Orlici where just the first part is… just remove all that aren’t exactly 4 letters (and same for all the other X letters quizzes)
is it me or the hardest/missed is not working?
just worked for me.
Very hard to find the “most common English spelling” for non English-speaking people !