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Geography

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World Circle Radius Population Split Challenge

Directions

The object of this quiz is to adjust each circle’s diameter so it splits the circle’s population as evenly as possible. When you click Start you will be shown a marker on a random world location. Also you will see an circle between 500 and 2500 km radius. Adjust the diameter by rotating it using the endpoints, trying to split the halves into equal populations. Then click submit. You are scored on how close you have split the circle into 50% population in each half.

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Other Quizzes You May Like:

Europe Circle Radius Population Split Challenge

The object of this quiz is to adjust each circle's diameter so it splits the circle's European population as evenly as possible. When you click Start you will be shown a marker on a random world location. Also you will see an circle between 100 and 1000 km radius. Adjust the diameter by rotating it using the endpoints, trying to split the halves into equal populations. Then click submit. You are scored on how close you have split the circle into 50% population in each half.

PLEASE NOTE: ALL of Turkey is included in counting population (not just European portion), and the portion of Russia west of 61.5 degrees E (just east of Chelyabinsk). Nothing outside Europe (such as Africa or middle east other than Turkey) is included toward the population count within a circle.

US Circle Radius Population Split Challenge

The object of this quiz is to adjust each circle's diameter so it splits the circle's population as evenly as possible. 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 circle between 200 and 500 miles radius. Adjust the diameter by rotating it using the endpoints, trying to split the halves into equal populations. Then click submit. You are scored on how close you have split the circle into 50% population in each half. Circle population is tallied by totaling all census tracts (small census areas of average 4K population) within that circle.

NOTE - population in Canada and Mexico is NOT counted at all, only US population within the circle.

World Countries 10×10 Blackout (Premium Only)

Click START to begin - then fill in the 100 squares with World countries (see NAMING NOTE below) based on the categories in the rows and cells. For example, if you are looking at a cell with 'Asia' in its row, and 'Starts With A' in the column, that cell can be filled in with 'Armenia.' Many shortened names of countries are accepted, such as DRC, CAR, UAE, UK, US, etc. Answering a country which doesn't fit in any remaining unanswered cell will end the quiz.

Occasionally a cell may not have a qualifying answer, in which case it will appear blank and be a gimme. After completing the quiz you can simply click RESTART to play again.

Please note that 'star on flag' does not include a representation of the Sun.

Scoring is based on 100 points for each correct (or blank) square, and 5 points are subtracted for every second used on the quiz. So you are rewarded for getting squares quickly, however be careful as not to name a country which doesn't qualify for an open cell.

NAMING NOTE: You must type a '.' (period) after a country name or abbreviation to submit it, to prevent entering a country you don't want to (i.e. Guinea when you want to enter Guinea Bissau). For country naming purposes, the following names are used: Cote d'Ivoire, Timor-Leste.

This quiz is only available to Premium members.

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