87% knows the answer to this question: "What does the phrase "card shark" mean? "

And do you know the answer to this one? "What unit of measurement is one-thousandth of a gram?"

43% knows the answer to this question: "When performing ballroom dance, who usually leads? "

And do you know the answer to this one? "I'm an Olympic swimmer who won 22 medals. Who am I?"

34% knows the answer to this question: "Taiwan is considered to be part of which continent? "

And do you know the answer to this one? "In which of these countries would you find aborigines?"

58% knows the answer to this question: "What dynasty built most of the present-day Great Wall of China as a way to keep out the Mongols? "

And do you know the answer to this one? "From which country was Evita Peron?"

36% knows the answer to this question: "Which country did Joan of Arc try to set free from English domination? "

And do you know the answer to this one? "Who is considered to be the founder of modern nursing?"

56% knows the answer to this question: "What was a battle fought in 1815 in Belgium in which Napoleon I met his final defeat? "

And do you know the answer to this one? "The ancient Egyptian civilization was based around which river?"

72% knows the answer to this question: "The Empire State Building opened in which US city in 1931? "

And do you know the answer to this one? "In 2009, archaeologists found Bluehenge about a mile away from what other structure?"

56% knows the answer to this question: "In 1994, who was elected the first black President of South Africa? "

And do you know the answer to this one? "In what year did France and Britain declare war on Germany?"

62% knows the answer to this question: "Where did Napoleon Bonaparte suffer his last defeat? "

And do you know the answer to this one? "Which of these continent - country - capital groups is correct?"

43% knows the answer to this question: "What is the name given to the thin membrane in the ear? "

And do you know the answer to this one? "Who is usually the chief executive official of a town or city?"

94% knows the answer to this question: "Which animal has mask-like markings on its face and a ringed tail? "

And do you know the answer to this one? "Which of these is a city in Texas?"

46% knows the answer to this question: "Of these, which is NOT a major US city? "

And do you know the answer to this one? "What is the term for a work of art made on a very reduced or small scale?"