30% knows the answer to this question: "Which South African leader died in 2013? "

And do you know the answer to this one? "What racial strife affected South Africa in the 20th century?"

31% knows the answer to this question: "What was the name of the controversial barrier that was constructed by East Germany in the 1960s? "

And do you know the answer to this one? "In which British city is Buckingham Palace located?"

51% knows the answer to this question: "In what year was the Cuban Missile Crisis? "

And do you know the answer to this one? "Archimedes is noted for running around the streets and screaming what?"

51% knows the answer to this question: "What is the Roman numeral for 7? "

And do you know the answer to this one? "Which operating system released it's 8th major edition in 2012?"

92% knows the answer to this question: "Who sang the famous song "Fernando" (1975) "

And do you know the answer to this one? "Who sang the famous song "Three Times A Lady" (1978)"

78% knows the answer to this question: "Who sang the famous song "Massachusetts" (1967) ? "

And do you know the answer to this one? "Who sang the famous song "Summer Of '69" (1984) ?"

76% knows the answer to this question: "Who sang the famous song "New York New York" (1979)? "

And do you know the answer to this one? "Who sang the famous song "Mandy" (1974)?"

69% knows the answer to this question: "Who sang the famous song "Mamma Mia" (1975) "

And do you know the answer to this one? "Who sang the famous song ”Puppy Love” (1972)?"

39% knows the answer to this question: "Who sang the famous song "Song Sung Blue" (1972) ? "

And do you know the answer to this one? "Who sang the famous song "Bohemian Rhapsody" (1975)"

83% knows the answer to this question: "Who sang the famous song "Annie's Song" (1974)? "

And do you know the answer to this one? "Who sang the famous song "(They Long To Be) Close To You" (1970) ?"

33% knows the answer to this question: "Who released the world's first commercially available microprocessor in 1971? "

And do you know the answer to this one? "What is the technique in which fresh paint is applied over an area where the paint is still wet?"

31% knows the answer to this question: "Who was the first woman to fly solo across the Atlantic? "

And do you know the answer to this one? "Who was the author of The Cat in the Hat?"