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10 most difficult Austria riddles

A list of Austria related questions that are most often answered incorrectly
Europe quiz
What is the second largest city in Austria, after Vienna?
Linz
Graz
Innsbruck
Salzburg
The four largest cities in Austria are Vienna (1.8 million), Graz (269,000), Linz (193,000) and Salzburg (146,000).
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0
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3
Very interesting!
Vienna riddles
Where is the headquarters of OPEC?
in Riyadh
in Dubai
in Caracas
in Vienna
OPEC was created in 1960 with headquarters in Geneva, Switzerland. It moved to Vienna, Austria in 1965.
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5
Very interesting!
oil riddles
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