50% knows the answer to this question: "If Dee is 7 years older than her 3-year-old sister, how old is Dee? "

And do you know the answer to this one? "What river flows through the Grand Canyon?"

63% knows the answer to this question: "Pharoahs were kings of which ancient civilisation? "

And do you know the answer to this one? "Founded in the 1970s, OPEC was a trade organisation for which industry?"

90% knows the answer to this question: "What sort of ships are the Vikings famously known to have used? "

And do you know the answer to this one? "Parker and Barrow were the surnames of what infamous couple?"

95% knows the answer to this question: "Which nationality does a cheeseburger belong to? "

And do you know the answer to this one? "You can find Yankee Stadium at which location?"

66% knows the answer to this question: "Urb, the Latin word for "city", is the root of what English word? "

And do you know the answer to this one? "Which of these wine-producing areas is in America?"

41% knows the answer to this question: "A toy dog breed and any mostly grey cat are both known by what Mediterranean name? "

And do you know the answer to this one? "What sculpted character is sitting on a mushroom in Central Park, along with the March Hare, Dormouse, Cheshire Cat and Mad Hatter?"

57% knows the answer to this question: "Who's missing from the Spice Girls' line up: Posh, Baby, Scary, Sporty, ...?' "

And do you know the answer to this one? "In 1940, Italian forces in Libya began attacking British forces in Egypt in order to gain control of a strategically important canal. What is the name of the canal?"

51% knows the answer to this question: "Michael Jackson and Lionel Richie co-wrote "We Are the World." For what cause? "

And do you know the answer to this one? "A plane departs at 5:30pm. At what time will it land if the flight takes eleven hours and a half?"

56% knows the answer to this question: "What sentence type is a single independent clause? "

And do you know the answer to this one? "Thanks to Spanish musician Andres Segovia, composers such as Brazil's Heitor Villa-Lobos began to write for what instrument?"

73% knows the answer to this question: "The Fragrance Wheel is a classification method used for what type of product? "

And do you know the answer to this one? "Which country unified its East and West sides in 1989?"

50% knows the answer to this question: "Who became the Chair of Notre Dame, aged just 34? "

And do you know the answer to this one? "Who was Benazir Bhutto?"

47% knows the answer to this question: "The 2011 film "The Iron Lady" is a biography of which historical figure? "

And do you know the answer to this one? "In what country was the 1987 film "The Last Emperor" set?"