39% knows the answer to this question: "The brilliant plumage of what national bird of India is due to an optical interference phenomenon called the Bragg reflection? "

And do you know the answer to this one? "What state's southern tip is consumed by the Everglades, an ecosystem of sawgrass marshes, cypress swamps and estuarine mangrove forests?"

91% knows the answer to this question: "What feature was added to London's City Hall in 2007, to make the building more energy efficient? "

And do you know the answer to this one? "Which of the following animals has the scientific name Varanus komodoensis?"

70% knows the answer to this question: "In February 1952, who went up Kenya's Treetops Hotel a princess, but came down a queen? "

And do you know the answer to this one? "Whom did Camilla Shand meet for the first time on a wet afternoon in 1972 at a polo field on Windsor Great Park?"

66% knows the answer to this question: "What is the word for getting rid of electrical charge by transferring it? "

And do you know the answer to this one? "Who was "knighted" on March 15, 1997?"

74% knows the answer to this question: "Which insect is red with black spots? "

And do you know the answer to this one? "Which of these substances is NOT metallic?"

58% knows the answer to this question: "Which of these famous sites is in the Indian city of Agra? "

And do you know the answer to this one? "Whose theory of special relativity argues that the faster you go, the slower time is?"

80% knows the answer to this question: "What is the name of the two-kilometer-long Parisian avenue that runs from Place de la Concorde to Place Charles de Gaulle? "

And do you know the answer to this one? "What is the name of the poem John Keats wrote to a singing bird?"

51% knows the answer to this question: "Who sang the famous song "Another Brick In The Wall" (1980)? "

And do you know the answer to this one? "Technophobia is the fear of what?"

71% knows the answer to this question: "What service employed such teenager couriers as Buffalo Bill Cody and Wild Bill Hickok, who raced for ten days, carrying the mail 1800 miles? "

And do you know the answer to this one? "In 1995, who famously was pursued by police whilst driving his white Ford Bronco? "

87% knows the answer to this question: "Who sang the famous song "(Sittin' On) The Dock Of The Bay" (1968) "

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

54% knows the answer to this question: "Where would you find Earth's longest river, the Nile? "

And do you know the answer to this one? "What colourfully named sea lies to the east of Egypt?"

61% knows the answer to this question: "Which of these landforms is an area of land lying between hills or mountains? "

And do you know the answer to this one? "What nationality was the illustrator William Heath Robinson?"