90% knows the answer to this question: "What was the name of the codes introduced by the US Post Office in 1963? "

And do you know the answer to this one? "Which of the following energy sources do gardens rely on most for survival?"

43% knows the answer to this question: "What was the nickname given to World War I ace pilot Manfred Von Richtofen? "

And do you know the answer to this one? "Who was a famous artist in the 1960s?"

76% knows the answer to this question: "Who directed the 1958 movie Touch of Evil? "

And do you know the answer to this one? "Which American clergyman, activist, and leader was born in 1929? "

85% knows the answer to this question: "Which country did St. Patrick help convert to Christianity? "

And do you know the answer to this one? "Who did Michael Jackson marry in 1994?"

44% knows the answer to this question: "How many minutes in 4 hours? "

And do you know the answer to this one? "Which of these words refers to harmful things that are added to the water, air or land?"

89% knows the answer to this question: "I Walk the Line' is what male singer-songwriter's breakthrough song? "

And do you know the answer to this one? "What is the name of a shot that protects you from disease?"

38% knows the answer to this question: "You call that a knife? What movie, starring Paul Hogan, got men bragging about the size of their knives? "

And do you know the answer to this one? "What is XVI in Roman numerals?"

70% knows the answer to this question: "What is the most widely known Chinese contribution to medicine? "

And do you know the answer to this one? "Which South American canal shares its name with a hat?"

52% knows the answer to this question: "Which medical term means referring to the bones? "

And do you know the answer to this one? "Where would a French child wear "un pyjama"?"

84% knows the answer to this question: "Quattro is which number in Italian? "

And do you know the answer to this one? "What is a third of 210?"

52% knows the answer to this question: "What is three multiplied by twenty? "

And do you know the answer to this one? "In 2012, many people were stranded by floods in New South Wales and Queensland in what country?"

78% knows the answer to this question: "What is a quarter of 24? "

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