85% knows the answer to this question: "What country gets its name from the old Roman port of Portus Cale, now called Oporto? "

And do you know the answer to this one? "If you order your men to hold their fire until they saw the enemy's sclera, what are they waiting to see?"

66% knows the answer to this question: "What do city trucks spread on roads to melt ice? "

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

42% knows the answer to this question: "Which of these rocks is hard and impermeable? "

And do you know the answer to this one? "Robert Doisneau is famous for an image of two people, doing what on a crowded Paris street in 1950?"

76% knows the answer to this question: "What was the surname of Sugar Ray, a 1958 boxing champion? "

And do you know the answer to this one? "What did a confectioner make?"

36% knows the answer to this question: "Leeds Castle in is which English county? "

And do you know the answer to this one? "Ireland's population grew phenomenally because of what New World food, then shrank again when the fungus Phytophthora infestans struck the crop in the 1840s?"

70% knows the answer to this question: "Rodgers and Hammerstein were originally asked to add some new songs to a show using Von Trapp family songs. What musical emerged? "

And do you know the answer to this one? "I spent time as an activist for paralysis research before I died in 2004, who am I?"

53% knows the answer to this question: "What is a natural fiber reeled from the cocoon of a worm? "

And do you know the answer to this one? "Who will Whitney Houston always love according to the title of her 1992 hit?"

73% knows the answer to this question: "What Tennessee Williams play is about Laura Wingfield, who lives in a fantasy world populated by glass animals? "

And do you know the answer to this one? "The old Sands Hotel in Vegas was dynamited and replaced by what city-themed hotel, which comes with its own gondolas?"

65% knows the answer to this question: "Alexander Graham Bell and his assistant were the first two people to use this invention, but First Lady Lucy Hayes was the third. What? "

And do you know the answer to this one? "The endangered "lesser one-horned" variety of what ungulate is also known as the Javan species?"

30% knows the answer to this question: "If you know that it's also called schwarzwalder kirschtorte, you can probably guess that it's a cake named for what country's Black Forest? "

And do you know the answer to this one? "In Pirates of the Caribbean: At World's End, what iconic rocker played Jack Sparrow's father?"

39% knows the answer to this question: "Which two countries were involved in the Louisiana Purchase? "

And do you know the answer to this one? "Lorna Patterson stepped into Goldie Hawn's boots for the TV version of what movie, for which Hawn got an Oscar nomination?"

40% knows the answer to this question: "Which of these famous philosophers is Greek? "

And do you know the answer to this one? "Something in the wild that is laniferous will offer you what crimped, scaled item, ideal for pulling over your gullible eyes?"