Which number system uses only the symbols 1 and 0?

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What ocean does the Congo River flow into?

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In the TV show "The Simpsons', before becoming a tavern owner, what was Moe's profession?

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Which French king build the Palace of Versailles?

What is the only food that cannot give Tony Chu a psychic sensation in the comic series "Chew"?

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In which popular 1950s film is a character played by Audrey Hepburn given 24 hours to do as she pleases in the eternal city?