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 
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.