92% knows the answer to this question: "Which Cuban leader visited Nelson Mandela during the latter's presidency? "

And do you know the answer to this one? "Made of Makrana marble, what is Agra's most famous tourist attraction?"

91% knows the answer to this question: "What does the phrase "card shark" mean? "

And do you know the answer to this one? "What unit of measurement is one-thousandth of a gram?"

54% knows the answer to this question: "What is the longest river in the United States? "

And do you know the answer to this one? "In what U.S. state are the cities of Philadelphia, Pittsburgh and Harrisburg located?"

42% knows the answer to this question: "What is table salt's chemical name? "

And do you know the answer to this one? "What do electricians use to test circuits?"

84% knows the answer to this question: "Geneva, the European headquarters of the United Nations, is located in which country? "

And do you know the answer to this one? "What is the primary ingredient of a Swiss fondue?"

45% knows the answer to this question: "What is the name of the bone which protects the brain? "

And do you know the answer to this one? "Dermatitis is an inflammation of what part of the body?"

83% knows the answer to this question: "What Julia Roberts movie is known in China as I Will Marry a Prostitute to Save Money? "

And do you know the answer to this one? "It was actually Alfredo Codona of the Flying Codonas who did the swinging through the trees in what movie?"

77% knows the answer to this question: "Bjorn Ulvaeus, Benny Andersson, Agnetha Faltskog and Anni-Frid Lyngstad formed what Swedish band? "

And do you know the answer to this one? "Who is the famous daughter of Billy Ray Cyrus who had a major hit with Achy Breaky Heart?"

54% knows the answer to this question: "What now historic line did Neil Armstrong utter after stepping onto the Moon's surface? "

And do you know the answer to this one? "Winston Churchill served as Prime Minister of which European country?"

52% knows the answer to this question: "What Rod Stewart single was No. 1 in the U.S. and U.K. in 1978? "

And do you know the answer to this one? "In which "I" are cows considered sacred?"

58% knows the answer to this question: "Which of these states has a coastline? "

And do you know the answer to this one? "What medical word refers to the heart?"

68% knows the answer to this question: "Which gadgets can be LED, LCD or Plasma? "

And do you know the answer to this one? "With what country to its north does the US share a 3000 mile-long border?"