40% knows the answer to this question: "Who began writing "Harry Potter and the Philosopher's Stone" in 1990? "

And do you know the answer to this one? "Whom did Britain's Prince Charles marry on July 29, 1981?"

34% knows the answer to this question: "The Tea Party are named after an event which took place in which American city during the late eighteenth century? "

And do you know the answer to this one? "What war did Muhammad Ali famously refuse to fight in?"

41% knows the answer to this question: "In 2012, which country held its first election following the death of Muammar Gaddafi? "

And do you know the answer to this one? "In which city did Julius Caesar die?"

67% knows the answer to this question: "During which dynasty was Beijing's Forbidden City -- and a lot of great vases -- built? "

And do you know the answer to this one? "The 'Luger' pistol was used predominantly by which country during World War I?"

91% knows the answer to this question: "Which member of a royal family was killed in a car crash in Paris in 1997? "

And do you know the answer to this one? "Who did South Africa release in 1990 after over 27 years of imprisonment?"

55% knows the answer to this question: "The Statue of Liberty was a gift from which country? "

And do you know the answer to this one? "Which is the best definition for history?"

30% knows the answer to this question: "The July Revolution of 1830 toppled Charles X in favor of Louis-Philippe. Where? "

And do you know the answer to this one? "Which of these people did Marcus Junius Brutus help kill?"

39% knows the answer to this question: "Prince Rainier III of Monaco married which Hollywood actress? "

And do you know the answer to this one? "Which animal famously held special significance for the ancient Egyptians?"

39% knows the answer to this question: "What is the name of the first mammal to be successfully cloned from an adult cell? "

And do you know the answer to this one? "Who gave her son Prince Charles the customary title of Prince of Wales?"

46% knows the answer to this question: "What famous person said: "Sometimes it is not enough to do our best; we must do what is required"? "

And do you know the answer to this one? "Benito Mussolini was leader of which country in the 1920s?"

30% knows the answer to this question: "Which country launched the health care exchange for its Affordable Care Act in 2013? "

And do you know the answer to this one? "Of these, which is a web-based entrepreneur born in 1984? "

87% knows the answer to this question: "Which Queen of England celebrated her Diamond Jubilee in 2012? "

And do you know the answer to this one? "At a 1998 conference, what single currency did 12 European nations agree to adopt?"