80% knows the answer to this question: "If you're enduring arthroscopic knee surgery, or endoscopic surgery, as it's sometimes called, what is happening to you? "

And do you know the answer to this one? "What is water stored beneath the surface of the Earth called?"

45% knows the answer to this question: "What name is given to the ring of thick, shaggy fur around a male African lion's head? "

And do you know the answer to this one? "What did the vegetarian Abrosaurus eat?"

67% knows the answer to this question: "In what 1977 film did Harrison Ford play Han Solo? "

And do you know the answer to this one? "Who was literally "singing in the rain" in "Singin' in the Rain"?"

30% knows the answer to this question: "Who sang the famous song "Johnny B. Goode" (1958) ? "

And do you know the answer to this one? "Who sang the famous song ”California Dreamin’” (1965)?"

71% knows the answer to this question: "Who sang the famous song Kids Wanna Rock (1985)? "

And do you know the answer to this one? "Who sang the famous song Waiting For A Girl Like You (1987)? "

58% knows the answer to this question: "What was the Iran-Contra affair? "

And do you know the answer to this one? "As of 2007, which of these bird species is already gone, having last been seen off Iceland in 1844?"

63% knows the answer to this question: "What are crayons made out of? "

And do you know the answer to this one? "What is the first name of Sir Lipton, the creator of Lipton Tea?"

79% knows the answer to this question: "Although associated with Italian pasta, what red sauce wasn't even possible until the key ingredient was discovered in the New World? "

And do you know the answer to this one? "In what US is the island of Manhattan located?"

44% knows the answer to this question: "Which iconic UK singer started his farewell tour, 'Farewell Yellow Brick Road', on 8 September 2018? "

And do you know the answer to this one? "What city's current name is believed to have come from the Korean word for "capital city", "Seorabeol"?"

78% knows the answer to this question: "What type of milk has the lowest fat content? "

And do you know the answer to this one? "In printers, HP is a short term for what?"

42% knows the answer to this question: "The 'Stade de France' is a sport stadium in which city? "

And do you know the answer to this one? "In which US city would you come across the Golden Gate Bridge?"

86% knows the answer to this question: "What famous speech did Martin Luther King, Jr. deliver on August 28, 1963? "

And do you know the answer to this one? "What was the name of the surgery game which required a steady hand?"