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10 most difficult the United States riddles

A list of ten (out of 51) the United States related questions that are the most often answered incorrectly
The United States quiz
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
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5
Very interesting!
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The United States quiz