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10 most difficult United States riddles

A list of ten (out of 183) United States related questions that are the most often answered incorrectly
United States quiz
How many Summer Olympic games were held in the United States?
1
2
3
4
There were the Olympic Games in St. Louis (1904), twice in Los Angeles (1932, 1984) and in Atlanta (1996)
Kasia
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0
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0
Very interesting!
sport of North America riddles
Which river flows into Lake Ontario?
Niagara River
Saint Lawrence River
Ohio River
Columbia River
Niagara River flows from Lake Erie to Lake Ontario.
globalquiz.org
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0
Correct this question
0
Very interesting!
Canada riddles
Which large IT company doesn't have its headquarters in the Silicon Valley?
IBM
AMD
Google
Apple
IBM is a company based in New York. The history of IBM is longer than the history of Silicon Valley.
Ninjai
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-1
Correct this question
5
Very interesting!
economy riddles
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United States quiz