99% knows the answer to this question: "The amount of mineral matter per square centimetre of bones is known as what? "

And do you know the answer to this one? "When the ... gets tough, the tough get going"

99% knows the answer to this question: "What is the name for small spots of pigment on the skin? "

And do you know the answer to this one? "Which fruit has short, sharp leaves rising from its top?"

99% knows the answer to this question: "Which iconic fast food chain expanded rapidly in the 1980s, creating thousands of jobs? "

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

99% knows the answer to this question: "What singer/dancer insured both his legs (for $75,000) and both his arms (for $20,000)? "

And do you know the answer to this one? "What director got his middle name, both from the car company that sponsored his dad's radio show and from the man for whom the hospital in which he was born was named?"

0% knows the answer to this question: "What are Earth's seven large land masses called? "

And do you know the answer to this one? "Which historical figure is Santa Claus based on?"

0% knows the answer to this question: "Which crop is grown in paddy fields? "

And do you know the answer to this one? "What condition means always worrying that you are ill?"

100% knows the answer to this question: "The official residence of the British Prime Minister is in which London street? "

And do you know the answer to this one? "What month has the least number of days?"

96% knows the answer to this question: "On which continent is the United States located? "

And do you know the answer to this one? "What does the C stand for in the lung condition COPD?"

98% knows the answer to this question: "This animal proverbially never forgets, and according to Shermin de Silva's research in Sri Lanka, does in fact have a prodigious recollection for the routes to watering holes. What animal? "

And do you know the answer to this one? "What country in Europe, with Warsaw as its capital, uses zloty as its currency?"

94% knows the answer to this question: "The National Cowboy Hall of Fame and Western Heritage Center is in a city that overlooks the Chisholm Trail. Where? "

And do you know the answer to this one? "What is the missing word: Familiarity ... contempt"

100% knows the answer to this question: "Avian flu is also known as which type of flu? "

And do you know the answer to this one? "What does the G stand for in someone who is a GP doctor?"

98% knows the answer to this question: "What Rodgers and Hammerstein musical was based on Margaret Landon's novel "Anna and the King of Siam"? "

And do you know the answer to this one? "What kind of '... Fields Forever' was a hit for the Beatles in the '60s and Candy Flip in the '90s?"