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World 10 Circle Population Challenge

Directions

The object of this quiz is to place 10 circles of radius 1000 km on the map so that they contain the largest total population.

When you begin you’ll be given a 1000-km radius circle centered on the map. Move it using the mouse and click SUBMIT. You will be given a score for that circle corresponding to the total population contained within it based on world population density at https://human-settlement.emergency.copernicus.eu/index.php. Try to complete all 10 circles with the highest total score.

Any INTERSECTING areas are only counted one time, so no population will be counted more than once.

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When you begin you'll be given a 1000-km radius circle centered on the map. Move it using the mouse and click SUBMIT. You will be given a score for that circle corresponding to the total population contained within it based on world population density at https://human-settlement.emergency.copernicus.eu/index.php. Try to complete all 20 circles with the highest total score.

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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.
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World Circle Population Selection Challenge

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 world population density 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.

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blakeaz

6 days ago

Im stuck around 4.6 billion, I wonder if anything in the Americas or in Africa is worth it

tendog

6 days ago

Reply to blakeaz

there are 2 entirely separate circles in africa that get ~375.0M and ~320.8M

slowpoke

7 days ago

how do I save my score?

BenNemo

7 days ago

Reply to slowpoke

It saves automatically when you’ve placed all ten circles. You have to refresh the page to see it.

theion666

12 days ago

I can’t see the circles. When I click submit, the circle shows up but I am unable to see or interact with it before that

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darin

11 days ago

Reply to theion666

You have to click ‘Next Location’ after Submit to have the next circle pop up on the map. It will always show at the same initial spot on the map (northern Africa).