Type 'easy' or 'hard' to begin the quiz. Easy is a 15-degree grid, hard is a 10-degree grid. Then, name any 50K+ World city in each grid square which fits the category label for each square. Grid will be randomly placed each time the quiz is played.
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 250-500K) 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 square.
Quiz Takers 
Curious why the second Indian city is Mira Bhayandar and not Thane?
Per typing in Thane on Google Maps, it looks like the eastern part of the city is not on the island.
1) Of the five boroughs of New York City, only The Bronx is not entirely located on islands. I say it should count.
2) While the majority of Hong Kong’s residents do live on the mainland, if you only counted the island population of Hong Kong, it would still make the top 40 overall.
3) Same goes for Xiamen (Huli + Siming = 2.1 million).
4) I don’t believe any part of Zhongshan is on an island.
I want to include cities entirely on islands. Also it appears Zhongshan is entirely on a river island (Zhongshan island).
Geoje(South Korea) is also a city located on an island.
will add, thanks.
Would you consider doing one that’s largest cities above a certain altitude?
it’s tough because largest cities can cover a large span of altitude
Venice is a curious case… the city center is definitely on an island but the majority of the population of the Venice commune is found mainland. A little known fact I think.
Yes, I guess it’s a good criteria.