How do I play this quiz?

Test your knowledge with the US Grid Population Challenge Quiz. Discover fun and interesting facts about the population distribution across the United States.

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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US Grid Population Challenge

Directions

First choose a grid size by typing ’10’, ‘5’ or ‘2.5’. A grid of that size lat/long will be placed on the map (so if you choose ’10’ the grid width and height will be 10 degrees). Then, double click on the grid square with the highest population within it (based on US census tract information). 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.

Try the Randomly Placed Grid version!

Enter grid spacing to begin ('10', '5' or '2.5')...

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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 on the map with radii between 10 and 250 miles 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.

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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 US census tract (there are over 80K census tracts in the US). Also you will see an adjustable circle of radius 100 miles to start. Adjust the circle's radius by dragging it until it contains the target number of people shown - this target will be between 100K and 25 million people. Then click submit. You are scored on how close your circle's population is to the target. Circle population is tallied by totaling all census tracts (small census areas of average 4K population) within that circle.

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darin

1 year ago

New quiz type – more geographies to come as well as a random grid placement version!

blocho

1 year ago

This is a fun challenge