40% knows the answer to this question: "Who played Jack Sparrow in the Pirates of the Caribbean movies? "

And do you know the answer to this one? "What are the large masses of land containing most of the world's countries called?"

81% knows the answer to this question: "What effect does exercise usually have on metabolism? "

And do you know the answer to this one? "What US state is nicknamed "The Lone Star state"?"

46% knows the answer to this question: "What is a small box that moves people and things from floor to floor using cables or hydraulics? "

And do you know the answer to this one? "Name the country with the world's highest population?"

78% knows the answer to this question: "Ma Ying-jeou won a second term as President of what island country in 2012? "

And do you know the answer to this one? "Which country did Joan of Arc try to set free from English domination?"

60% knows the answer to this question: "What is the name of the royal residence located in Kensington Gardens? "

And do you know the answer to this one? "What was the first name of 1920s British crime writer Mrs Christie?"

88% knows the answer to this question: "Which of these celebrities publically endorsed Barack Obama in early 2008? "

And do you know the answer to this one? "Civil rights activists marched from Selma to Montgomery in which US state in 1966?"

58% knows the answer to this question: "What is the name for any plant used for flavoring, food, medicine or perfume? "

And do you know the answer to this one? "What is the clear, straw coloured part of your blood called?"

71% knows the answer to this question: "The amount of mineral matter per square centimetre of bones is known as what? "

And do you know the answer to this one? "When the ... gets tough, the tough get going"

78% knows the answer to this question: "What is the name for small spots of pigment on the skin? "

And do you know the answer to this one? "What is 99 take away 55?"

51% knows the answer to this question: "Which iconic fast food chain expanded rapidly in the 1980s, creating thousands of jobs? "

And do you know the answer to this one? "What is the female star of an opera called?"

55% knows the answer to this question: "What singer/dancer insured both his legs (for $75,000) and both his arms (for $20,000)? "

And do you know the answer to this one? "What director got his middle name, both from the car company that sponsored his dad's radio show and from the man for whom the hospital in which he was born was named?"

46% knows the answer to this question: "What is a "baguette"? "

And do you know the answer to this one? "Dry fortified wines are best served as aperitifs to stimulate what?"