61% knows the answer to this question: "I'm an actor who plays Iron Man in a host of Marvel movies. Who am I? "

And do you know the answer to this one? "What is located at 263 Prinsengracht in Amsterdam?"

39% knows the answer to this question: "The Matterhorn is a mountain on the border of Italy and what other country? "

And do you know the answer to this one? "In which 2001 movie did David Spade play the character Joe Dirt?"

74% knows the answer to this question: "Which of these countries is long and thin in shape? "

And do you know the answer to this one? "Which town did the Romans refer to as Aquae Sulis?"

90% knows the answer to this question: "Which fictitious creature created by Dr. Seuss is said to have stolen Christmas? "

And do you know the answer to this one? "What is rock star Neil's last name?"

36% knows the answer to this question: "What heart operation can be a triple or a quadruple? "

And do you know the answer to this one? "What are soldiers who fight on horseback?"

37% knows the answer to this question: "Eleven percent of what island country is covered by glaciers? "

And do you know the answer to this one? "What is the female star of an opera called?"

32% knows the answer to this question: "Broken bones are usually held still while they heal with what? "

And do you know the answer to this one? "Prior to the Euro, what was the currency in France?"

60% knows the answer to this question: "In what country is the city of Seville? "

And do you know the answer to this one? "What world leader was such a fan of Yes Minister that she wrote a skit and roped the show's stars into performing it with her in 1984?"

59% knows the answer to this question: "Famous prisoners include Voltaire, the Marquis de Sade and the Man in the Iron Mask. Where? "

And do you know the answer to this one? "What did Mahmoud Ahmadinejad ban from state-run stations in December 2005?"

79% knows the answer to this question: "Sting won a Grammy in 1988 for Best Pop Vocal Performance for what album? "

And do you know the answer to this one? "What was the result of the January 2014 match when Messi made his return from injury?"

84% knows the answer to this question: "Which of these countries does not have Facebook? "

And do you know the answer to this one? "The Japanese word for "fried food" actually comes from the Portuguese, who introduced it. What is it?"

42% knows the answer to this question: "Which political party did President George H.W. Bush represent? "

And do you know the answer to this one? "What lyric follows "I'm not paralyzed" in "Paralyzer"?"