64% knows the answer to this question: "Which flag, used by pirates, featured a skull and cross-bones? "

And do you know the answer to this one? "Which famous scientist was born in Germany in 1879, became a Swiss citizen in 1901 and later became a US citizen in 1940?"

68% knows the answer to this question: "What fruity California county was created by two lawyers who took the land to settle a debt? "

And do you know the answer to this one? "Which of these fortresses is not in Europe?"

84% knows the answer to this question: "Which of these countries is divided into Highlands and Lowlands? "

And do you know the answer to this one? "In which natural environment are 'dunes' found?"

77% knows the answer to this question: "What sort of headgear did Roman Centurions wear? "

And do you know the answer to this one? "Which space program went to the moon?"

59% knows the answer to this question: "What were the games that were held in Greece to honor the god Zeus called? "

And do you know the answer to this one? "Which of these was a name commonly given to the 1920s?"

84% knows the answer to this question: "Whom did Camilla Shand meet for the first time on a wet afternoon in 1972 at a polo field on Windsor Great Park? "

And do you know the answer to this one? "In February 1952, who went up Kenya's Treetops Hotel a princess, but came down a queen?"

62% knows the answer to this question: "Otto von Bismarck was a statesman from which country? "

And do you know the answer to this one? "What Roman town was destroyed by the eruption of Mt. Vesuvius?"

69% knows the answer to this question: "Which Hun emperor is called the Scourge of God? "

And do you know the answer to this one? "During which civil war did the battle of 'Gaines' Mill' take place?"

88% knows the answer to this question: "What was the first name of African-American 1930s athlete Owens? "

And do you know the answer to this one? "Which long spear was often used by mounted warriors during the medieval era?"

84% knows the answer to this question: "The Soweto uprising began in what country in 1976? "

And do you know the answer to this one? "Who was Oscar Wilde?"

40% knows the answer to this question: "Who was murdered in the Ides of March in 44 BC by a group of senators led by Brutus and Cassius? "

And do you know the answer to this one? "What is the domain ruled by a single authoritative sovereign?"

94% knows the answer to this question: "Who is Mikhail Gorbachev? "

And do you know the answer to this one? "What was the first name of Marx, a German communist philosopher?"