38% knows the answer to this question: "By definition, what produces a sonic boom? "

And do you know the answer to this one? "What railway, the world's longest, as of 2010, moves over 5,700 miles of Russia?"

84% knows the answer to this question: "What colorful square separates the Kremlin from an historic merchant quarter called Kitaigorod? "

And do you know the answer to this one? "What was the name of the General who led the U.S. forces that were defeated by allied Native American tribes at the Battle of the Little Bighorn?"

50% knows the answer to this question: "Who was the Prime Minister of Great Britain during World War II? "

And do you know the answer to this one? "What is the classification of a weasel?"

46% knows the answer to this question: "What's the name of a famous Sioux leader during the Indian Wars? "

And do you know the answer to this one? "Clarksville and Memphis are cities in which US State?"

47% knows the answer to this question: "Which MP3 player was created by Apple? "

And do you know the answer to this one? "Which former president had worked as a peanut farmer?"

73% knows the answer to this question: "Which country is located on the continent of South America? "

And do you know the answer to this one? "What country's flag is called the Union Jack?"

51% knows the answer to this question: "What color are ripe cherries? "

And do you know the answer to this one? "World War I officially ended on November 11, 1918, at 11 AM. At 10:59 AM, one minute before WWI officially ended, a demoted US soldier, Henry Gunther tried to regain his honor by leading a squad attack on a German machine gun roadblock in Chaumont-devant-Damvilliers, France. When was this?"

45% knows the answer to this question: "Nobody is sure how Felis silvestris catus makes this sound, and we're not even sure why, but we do know that the vibrations reduce stress in people, and that they occur at a frequency that helps bones heal. What sound is this? "

And do you know the answer to this one? "In 1924, what was then Petrograd was renamed Leningrad. What is that city called today?"

71% knows the answer to this question: "Who was Charles de Gaulle? "

And do you know the answer to this one? "If you run a shop specializing in magazines, newspapers and other general items, what is your job?"

95% knows the answer to this question: "Quesadillas are included in which cuisine? "

And do you know the answer to this one? "Common in Asian cuisine, mangetout, snow, sugar and snap are varieties of what vegetable, eaten with the pod?"

56% knows the answer to this question: "What is the name of the Ukrainian power plant where a major nuclear accident occurred in 1986? "

And do you know the answer to this one? "What was President Ford's first name?"

82% knows the answer to this question: "In 2013, Hassan Rouhani became the new President of which country? "

And do you know the answer to this one? "In what industry did John Davidson Rockefeller get rich?"