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 
Porto Alegre is LARGER than Durban, both in terms of municipality population (550k for Durban, 1.4 million for Porto Alegre) as well as metro area population (4.3 million Porto Alegre, 4.2 million Durban)
Correct that.
South Africa uses “urban areas” to tabulate populations, so Durban has 2.7 million per this:
https://citypopulation.de/en/southafrica/cities/
how is sydney bigger than Buenos Aires (yes they were in same grid i checked)
BA city proper is actually smaller.
can Nacala be accepted for Nacala porto?
adding.