51% knows the answer to this question: "What brother-sister team was the top-selling musical act through the 1970s? "

And do you know the answer to this one? "Originally planned for Boulder Canyon, what dam in the Black Canyon created Lake Mead?"

65% knows the answer to this question: "The Dutch East India Company founded a station in what African country, establishing a settlement? "

And do you know the answer to this one? "New Orleans and San Francisco have the only National Historic Landmarks that move. What are they?"

33% knows the answer to this question: "What device consists of one or more cells that produce direct current? "

And do you know the answer to this one? "What organ has two chambers called atriums and two chambers called ventricles?"

51% knows the answer to this question: "Which of the following is a well-known Japanese condiment? "

And do you know the answer to this one? "Which is the app that diagnoses you with an illness according to your symptoms?"

61% 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? "Where is Bordeaux, whose Premier Cru table wines are among the world's best: Chateau Mouton-Rothschild, Chateau Lafite-Rothschild, Chateau Latour, Chateau Margaux and Chateau Haut-Brion?"

37% knows the answer to this question: "Someone who worked in a tannery used which type of material? "

And do you know the answer to this one? "Hawkeye and Trapper John were characters on what popular TV series which debuted in 1972?"

52% knows the answer to this question: "What is the capital city of Antarctica? "

And do you know the answer to this one? "What country bombed Pearl Harbor in World War II?"

46% knows the answer to this question: "Which of these foods is in the vegetables group? "

And do you know the answer to this one? "In what country's McDonald's are you most likely to find chicken tatsuta, a fried chicken sandwich spiced with soy sauce and ginger?"

81% knows the answer to this question: "What did a dinosaur's long tail help him do? "

And do you know the answer to this one? "Which country has the bigger population?"

39% knows the answer to this question: "First come, first ... "

And do you know the answer to this one? "Assessed for insurance purposes at $100 million on December 14, 1962, what does Guinness call the world's most valuable painting?"

83% knows the answer to this question: "Hiram King Williams and his son, Randall Hank Williams, and his grandson, Shelton Hank, all used slight variations of what stage name? "

And do you know the answer to this one? "Which piece of computer hardware can be laser, dot-matrix or inkjet?"

49% knows the answer to this question: "What did Marilyn Novak change her name to, to avoid comparisons to that other blonde Marilyn? "

And do you know the answer to this one? "Who made a big splash with his movie debut, playing Benjamin Braddock in The Graduate?"