How do I play this quiz?

Test your knowledge with the World 50K+ City Grid Challenge Quiz. Choose cities from different grid squares and uncover fascinating facts along the way.

Do abbreviations or alternate spellings count?

Yes. Most quizzes allow common abbreviations, alternate spellings, and short forms. Try typing just the first few letters — if it matches, it will autofill.

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World 50K+ City Grid Challenge

Directions

Choose a number of cities by typing ‘3’, ‘5’, or ’10’. Then, enter the largest number of 50K+ population cities you chose in each 15-degree grid square. For example if you choose ‘5’ you are only naming the 5 largest cities in each square. Only green squares contain answers. When you have 2 left to go in a square it will fill in faintly yellow, 1 left it will be orangish, and all done it turns red. A time bonus is given for completing a square (it is greater for higher levels).

hugequiz Premium members will see the top 25 missed cities at the end of the quiz as purple markers.

Enter '3', '5', or '10' to begin.

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Quiz Takers

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The object of this quiz is to click on the circle containing the largest population. When you begin you'll be shown 2 circles with radii between 100 and 2500 km on the map which do not intersect. Click on the one with the larger population within it (based on US census tract info) then 'Submit' - if you are correct you'll move on. One incorrect round and the quiz is over. Every 5 rounds the number of circles on the map will increase by 1. Try to build the longest streak of correct circles. Circles displayed will always be non-intersecting.

World Grid Population Challenge

First choose a grid size by typing '30', '20', or '10'. A grid of that size lat/long will be placed on the map (so if you choose '20' the grid width and height will be 20 degrees). Then, double click on the grid square with the highest population within it (based on world 10km x 10km population density estimates). The highest-population remaining square will give you 100 points, all the way down to 0 for the one with the smallest population. Try to obtain the most points by successively double-clicking on the highest-populated grid square.

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World Circle Radius Population Challenge

The object of this quiz is to adjust each circle's radius so it contains the target population shown at the right. When you click Start you will be shown a marker on a random populated world grid square (there are over 800K 10x10 km grid squares used for the data, courtesy of https://human-settlement.emergency.copernicus.eu/index.php). Also you will see an adjustable circle of radius 500 km to start. Adjust the circle's radius by dragging it until it contains the target number of people shown - this target will be between 2.5 and 250 million people. Then click submit. You are scored on how close your circle's population is to the target.

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TheAllinOne

1 month ago

what’s the last of the 10 cities in the DRC, Angola, Zambia square if not Bukavu?

TheAllinOne

1 month ago

Reply to TheAllinOne

nvm i found it

alicero

8 months ago

apparently, Coyhaique doesn’t exist

Author

darin

8 months ago

Reply to alicero

Just under 50K…
https://citypopulation.de/en/chile/aysen/coyhaique/11101001__coyhaique/

StalkingWolf

2 years ago

The extreme timelimit takes the fun completle out of it for me, i need to guess and try a lot and after i am barly finished with one continent my time is over. As much as i like your side and aprechiate the work you put in it, but the timelimits are too severe in many of your quizzes making them less fun.

Author

darin

2 years ago

Reply to StalkingWolf

I’ll bump the time up a bit on this quiz.

alexkowal

1 year ago

Reply to darin

really enjoyed this one, thank you

EMS612

2 years ago

I don’t want to spoil, so I’ll be vague. What’s with these quizzes recognizing a certain portion of a major South African city as its own city?

Author

darin

2 years ago

Reply to EMS612

South African cities are the ‘places’ under the ‘Urban Areas & Places’ section of this page, otherwise you are using large municipalities and urban areas and double counting.. https://citypopulation.de/en/southafrica/