87% knows the answer to this question: "Who sang the famous song "Zing! Went the Strings of My Heart" (1943)? "

And do you know the answer to this one? "What is unusual about Colombia's Magdalena River?"

47% knows the answer to this question: "What number indicates normal visual acuity? "

And do you know the answer to this one? "Although Alexander Graham Bell is credited with inventing this, he actually improved a device invented in Germany by John Philip Reis in 1861. What?"

91% knows the answer to this question: "The song "La Cucaracha," about a pot-smoking cockroach, became popular during what country's civil war in the 1910s? "

And do you know the answer to this one? "Is a gong a wind, string, percussion or keyboard instrument?"

70% knows the answer to this question: "Palace of Versailles is in which country? "

And do you know the answer to this one? "What is the art of folding paper into shapes, such as flowers and animals, called?"

68% knows the answer to this question: "Who seized power of Libya in 1969 in a bloodless military coup? "

And do you know the answer to this one? "What has the main influence on the US climate?"

86% knows the answer to this question: "In 1866 a 5-cent coin was introduced which became known as the what? "

And do you know the answer to this one? "In which popular 1950s film is a character played by Audrey Hepburn given 24 hours to do as she pleases in the eternal city?"

66% knows the answer to this question: "Where was Premier Milka Planinc in power from 1982-1986? "

And do you know the answer to this one? "What was the title for the emperor of Russia from 1546 until 1721 but remained in common use until 1917?"

44% knows the answer to this question: "Who sang the famous song "Wonderful Time Up There / It’s Too Soon To Know" (1958)? "

And do you know the answer to this one? "Who sang the famous song "Take A Message To Mary" (1959)?"

64% knows the answer to this question: "Versions of what food include the Chicago deep dish, California gourmet and Hawaiian, which comes with pineapple? "

And do you know the answer to this one? "The famous Tea Party took placein what year?"

85% knows the answer to this question: "What is 85 plus the number of days in January? "

And do you know the answer to this one? "Eggs produced by hens that are raised outdoors are known as what?"

41% knows the answer to this question: "A turnkey worked in which type of building? "

And do you know the answer to this one? "What was the name of Lebanese singer Melhem Zein's first album?"

73% knows the answer to this question: "Something that is clear enough to allow light to pass is best described by which science term? "

And do you know the answer to this one? "What do scientists use to help organise the elements?"