Type 'easy' or 'hard' to begin the quiz. Easy is a 15-degree grid, hard is a 10-degree grid. Then, try to name the LARGEST city in each grid square which fits the category label for each square. To name a city, you must first click on the grid square to make it have a GREEN border. Then, type in the city answer for that square followed by a '.' (a period). You are given a score from 0 to 100 based on your answer's population compared to the largest city accepted in that square (100 being you named the largest city).
LETTER: means the city starts with that letter.
NUMBER RANGE: (such as 2-5, 10+) means the city contains that many letters (excluding spaces and special characters).
POPULATION RANGE: (such as 50-100K) means the city has that range for its population.
2+ WORDS means the city name has 2 or more words (words denoted by a space or hyphen).
At the end of the quiz the largest population missed answer will show in each unanswered square, and for those answered the largest city will be listed if you didn't answer it.
Quiz Takers 
is it on purpose that here for L-M you have Lillestrom Norway however it is not present on the European quiz (supposedly part of Oslo there)? (and in general on the European quizzes Oslo is 1M whereas here only 700k)
yeah it should be the one that was in the Europe quiz – fixing this. had municipalities instead of ‘settlements’.
Could it be that there is a G-T city in Australia which is bigger than the current?
The Australian census counts it as ‘Gold Coast – Tweed Heads’
¯\(°_o)/¯