81% knows the answer to this question: "What did a greengrocer sell? "

And do you know the answer to this one? "Milkmen in the 70s and 80s delivered milk in which type of bottles?"

50% knows the answer to this question: "The 26th Amendment to the Constitution in 1971 lowered voting age from 21 to what? "

And do you know the answer to this one? "Who was Rembrandt van Rijn?"

61% knows the answer to this question: "Sparta, Athens and Crete are all cities of which ancient empire? "

And do you know the answer to this one? "Famous in the First Gulf War, how was General Norman Schwarzkopf usually described?"

50% knows the answer to this question: "A 2008 Jasper Johns exhibition exclusively featured 130 works in what dull color? "

And do you know the answer to this one? "If you want squid in an Italian restaurant, what do you order?"

40% knows the answer to this question: "What combination of 12 coins which are only nickels and dimes gives you one dollar? "

And do you know the answer to this one? "Rob bought two books at £1.99 each. If he paid for them with a £5 note, how much change did he get back?"

94% knows the answer to this question: "What are a woman's gonads? "

And do you know the answer to this one? "Usually, this happens in vivo, particularly in utero. What?"

65% knows the answer to this question: "Enough is ... "

And do you know the answer to this one? "It is the ... wheel that gets the grease"

45% knows the answer to this question: "From these, choose the state abbreviation for Wyoming. "

And do you know the answer to this one? "What vegetable is the main ingredient in salsa?"

63% knows the answer to this question: "What title was used by kings and leaders of the Egyptian Empire? "

And do you know the answer to this one? "What is another name for the voice box?"

59% knows the answer to this question: "Who is the month of July named after? "

And do you know the answer to this one? "Who starred in "The Fresh Prince of Bel Air"? "

32% knows the answer to this question: "Named by John Fremont for Istanbul's Golden Horn, the Golden Gate connects what bay to the Pacific Ocean? "

And do you know the answer to this one? "Rembrandt was Dutch, and Rembrandts are late-blooming varieties of what perennials, associated with the Dutch?"

36% knows the answer to this question: "Tell the truth and ... the Devil (Shakespeare, Henry IV) "

And do you know the answer to this one? "There's none so ... as those who will not hear"