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77% knows the answer to this question: "What is the name of the digital music service started by Apple in 2001? "

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80% knows the answer to this question: "Whose 2013 hit LP is "Believe"? "

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30% knows the answer to this question: "What is the capital of the Czech Republic? "

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41% knows the answer to this question: "What is the missing word: If you give a mouse a cookie, he'll always ask for a glass of ... "

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48% knows the answer to this question: "Manfred von Richthofen, considered the top ace of World War I, is better known by what nickname? "

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55% knows the answer to this question: "What year did the Jews in Poland's Warsaw ghetto start to fight the Nazis? "

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56% knows the answer to this question: "Founded in 1515, Havana is the oldest city on which island? "

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33% knows the answer to this question: "Who was Charles Darwin? "

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