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Test your knowledge of European cities with the Europe 50 Km Population Challenge Quiz. Can you name the cities with a population of 50K+ within a 50 km radius?

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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Europe 50 Km Population Challenge

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In 15 minutes name the Europe cities of 50K+ population trying to get the highest population. Population will only count when all other 50K cities within 50 km are guessed.

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Europe 10K+ City Grid Blackout Largest City Challenge

Type 'easy' or 'hard' to begin the quiz. Easy is a 5-degree grid, hard is a 2.5-degree grid. Then, try to name the LARGEST European 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.

UK 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 UK output area (there are over 200K output areas - also called Data Zones in Scotland and N Ireland - across the UK, the smallest census tabulation area). Also you will see an adjustable circle of radius 100 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 25K and 5 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 output areas within that circle.

NOTE - This quiz does NOT include any people in Ireland or other countries outside the UK, you are only trying to total the target number of people within the UK.

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Europe 10K+ City Latitude Grid Blackout

Type 'easy' or 'hard' to begin the quiz. Easy is a 1-degree range, hard is a 0.5-degree range. Then, name any 10K+ Europe city in each longitude range which fits the category label for each square.

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 250-500K) means the city has that range for its population.
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At the end of the quiz the largest population missed answer will show in each range.

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Ovamiat

9 years ago

50 km = 31 miles, in case you’re wondering.