57% knows the answer to this question: "Back in the 1970s, why might you (or maybe your dad) have had an eight-track cartridge in the car? "

And do you know the answer to this one? "What was an important step in getting deer or moose hides ready for making them into clothes? "

92% knows the answer to this question: "In what war was the 'Battle of Nashville'? "

And do you know the answer to this one? "Dracula was a book written by Bram Stoker about which supernatural creature?"

34% knows the answer to this question: "What is the written language of ancient Egyptians called? "

And do you know the answer to this one? "D-Day is associated with which war?"

64% knows the answer to this question: "What was the purpose of the American Colonization Society, founded in 1816? "

And do you know the answer to this one? "What is fine soil found on river bottoms called?"

85% knows the answer to this question: "Vitamin B6 deficiency can cause what? "

And do you know the answer to this one? "What insulting word is actually the name of a spicy Jamaican grilled meat, traditionally cooked in pit fires lit in oil barrels?"

50% knows the answer to this question: "What monarch made repeated visits to the front throughout WWI, earning him the deep respect of his subjects? "

And do you know the answer to this one? "Who sang the famous song "Song Sung Blue" (1972) ?"

86% knows the answer to this question: "A mountainous vent in the Earth's crust is known as a what? "

And do you know the answer to this one? "Which of these is a real mountain range, which you can find in the reference work that shares its name?"

66% knows the answer to this question: "Dodo's mum is 36 and her dad is 38 years old. If Dodo was born in 2007, how old will she be in 2019? "

And do you know the answer to this one? "What is the name of a celebrity music video made in 2008 in support of Barack Obama?"

83% knows the answer to this question: "Which mountain stands on the Japanese island of Honshu? "

And do you know the answer to this one? "What are the small spots called occasionally seen in your field of vision?"

56% knows the answer to this question: "A monkeys is classified as which of these? "

And do you know the answer to this one? "What are the colourful parts of a flower called?"

80% knows the answer to this question: "What rock band was formed in London in 1970, from the remains of another band called Smile? "

And do you know the answer to this one? "In what Darren Aronofsky ballet movie did Natalie Portman have a sex scene with co-star Mila Kunis?"

63% knows the answer to this question: "What does a king cobra use to immobilize and kill its prey? "

And do you know the answer to this one? "Which group of animals is not called a herd?"