61% knows the answer to this question: "After the first two cracked, the third version of this was created in 1753, by the firm of Pass and Stowe in Philadelphia. It's cracked now, too. What is it? "

And do you know the answer to this one? "In 1970, Alan Shugart was credited with which invention/discovery?"

54% knows the answer to this question: "What are Earth's seven large land masses called? "

And do you know the answer to this one? "Which historical figure is Santa Claus based on?"

52% knows the answer to this question: "Which of these UK cities is closest to Big Ben? "

And do you know the answer to this one? "Which Australian city is most famous for its opera house and harbour bridge? "

53% knows the answer to this question: "The official residence of the British Prime Minister is in which London street? "

And do you know the answer to this one? "In music, what is the term used to describe the rate or speed of a song?"

76% knows the answer to this question: "What does the C stand for in the lung condition COPD? "

And do you know the answer to this one? "OS stands for _________?"

87% knows the answer to this question: "What music genre is most often associated with Louis Armstrong? "

And do you know the answer to this one? "Which of these states has the highest population?"

90% knows the answer to this question: "What famous British ocean liner hit an iceberg and sank in 1912? "

And do you know the answer to this one? "Which American invented the light bulb?"

82% knows the answer to this question: "What King of England is known for having had six wives? "

And do you know the answer to this one? "Tsar Ivan of which country married Anastasia Romanova in 1547?"

81% knows the answer to this question: "What mausoleum was built in Agra, Uttar Pradesh, India by orders of Emperor Shah Jahan in memory of his wife? "

And do you know the answer to this one? "What is one of the main crops grown in Vietnam?"

49% knows the answer to this question: "Which type of fish comes in brook, brown, lake and rainbow varieties? "

And do you know the answer to this one? "What agency did the U.S. government form in response to the launch of Sputnik? "

78% knows the answer to this question: "What polyethylene bowls made Earl Tupper a millionaire? "

And do you know the answer to this one? "Tetanus often is introduced through dirty wounds. By what name is it better known?"

71% knows the answer to this question: "What is the first name of the First Lady whose husband's writings comprise "The Reagan Diaries"? "

And do you know the answer to this one? "What type of chocolate is best for dogs to consume?"