Type 'easy' or 'hard' to begin the quiz. Easy is a 5-degree grid, hard is a 2.5-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).
AK and HI are NOT included in this quiz as they often have grid squares with only one answer for this quiz.
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 
isn’t san jose costa rico bigger than san jose in California?
No, city proper population it is a bit smaller.
impossible challenge: play this game without yelling hurry up at the screen
This quiz doesn’t work. Clicking Mexico City gives me points for NYC. Each city is wrong.
you will get a small number of points if you guess far away from where you are supposed to click…it’s working fine for me.
Just a note that Kingston is also the name of one of Canada’s bigger cities.
true – but putting the country would be a bit of a hint, so it needs to known which Kingston is quite a bit bigger than the other to be in the top 100.
I took the quiz once, and it lists me in “your scores” as having taken it 30 or times – looks like it may be recording a new score with each city.
Same. I think it’s when you keep guessing after time runs out.
this bug should be fixed now.