44% knows the answer to this question: "Finish the title of Billy Joel's signature song: "Piano ______". "

And do you know the answer to this one? "What is the main ingredient of guacamole (and also the ingredient for which it is named in Nahuatl)?"

60% knows the answer to this question: "Which of these is NOT in Europe? "

And do you know the answer to this one? "What would you call an animal with hair that feeds milk to its babies?"

73% knows the answer to this question: "Which genre of fiction features historical events? "

And do you know the answer to this one? "Which insect is red with black spots?"

44% knows the answer to this question: "Who sang the song, "Gangnam Style"? "

And do you know the answer to this one? "Who sang the famous song "Touch Too Much" (1979)? "

79% knows the answer to this question: "Anthony Hopkins did a serious take on this president, whereas Dan Hedaya played it for laughs. Who? "

And do you know the answer to this one? "What 80s movie, directed by Nora Ephron, was modeled on An Affair to Remember, in particular given its reunion plans atop the Empire State Building?"

90% knows the answer to this question: "The Roman numeral C stands for which number? "

And do you know the answer to this one? "What is pi, to two decimal places?"

48% knows the answer to this question: "Desmond Tutu, the Archbishop of Cape Town, resides in what country? "

And do you know the answer to this one? "A bargee worked in which type of transport?"

89% knows the answer to this question: "The Nile River runs through which of these countries? "

And do you know the answer to this one? "Which Italian city was destroyed when Mount Vesuvius erupted?"

75% knows the answer to this question: "What Thai city has acquired the nickname "Sin City of Asia" for its level of sex tourism? "

And do you know the answer to this one? "Which vowel has been omitted from this Scandinavian country: SWDN?"

35% knows the answer to this question: "What is the name of the river which runs through London? "

And do you know the answer to this one? "Johann Strauss the Younger to the contrary, what "beautiful blue" river is actually mostly a yucky brown, thanks to all the pollution?"

86% knows the answer to this question: "Who sang the famous song "Rebel Rebel" (1974)? "

And do you know the answer to this one? "Who sang the famous song "Spanish Harlem" (1961)? "

55% knows the answer to this question: "Le Mans is a famous motorsport city In what European country? "

And do you know the answer to this one? "Complete the Bee Gees hit song title, "I've Gotta Get a ... to You"?"