67% knows the answer to this question: "A mason usually worked with which material? "

And do you know the answer to this one? "What nickname is given to the Santa Clara valley in California?"

53% knows the answer to this question: "Which plant is Ireland's national emblem? "

And do you know the answer to this one? "You could say that Marie Curie died as a result of her work. What killed her? "

49% knows the answer to this question: "Who sang the famous song "I’d Like To Teach The World To Sing" (1972)? "

And do you know the answer to this one? "Who sang the famous song "Play That Funky Music" (1976)?"

85% knows the answer to this question: "Dr Spock was famous in which medical field? "

And do you know the answer to this one? "Inflammation of the intestine and watery painful stool is a sign of what?"

31% knows the answer to this question: "Hey Jude' is a song by which artist? "

And do you know the answer to this one? "What Pennsylvania city is famous for manufacturing steel?"

66% knows the answer to this question: "Who is Buddy Holly? "

And do you know the answer to this one? "Over 2,340 miles, what river forms the boundary or part of the boundary of nine US states?"

81% knows the answer to this question: "Some people can use the auriculares muscles to move what body part? "

And do you know the answer to this one? "French scientist Leopold Trouvelot brought what pest to Massachusetts, which got loose and started eating its way through New England's trees?"

67% knows the answer to this question: "What is 94 plus 65? "

And do you know the answer to this one? "How much does 12 + 12 equal?"

63% knows the answer to this question: "Who was a member of the conservative Likud party of Israel and was once Prime Minister? "

And do you know the answer to this one? "What number comes next in this sequence: 8, 16, 32, 64...?"

44% knows the answer to this question: "What US state is nicknamed "The Great Lakes state"? "

And do you know the answer to this one? "What is the outer layer of human skin called?"

37% knows the answer to this question: "What is the name of the first mammal to be successfully cloned from an adult cell? "

And do you know the answer to this one? "What is the state capital of Hawaii?"

48% knows the answer to this question: "What piece of hardware does Ash Williams strap to his freshly severed arm in "Evil Dead II"? "

And do you know the answer to this one? "In which of his movies does Martin Scorsese play a taxi passenger who wants to kill his wife, stepping in for an actor who didn't show up?"