34% knows the answer to this question: "What emperor, Russia's first, died when he leaped into the cold Gulf of Finland to save some drowning sailors? "

And do you know the answer to this one? "Of these, which was a world leader in the 80s? "

95% knows the answer to this question: "Who were Yul Brynner (Chris), Steve McQueen (Vin), Horst Buchholz (Chico), Charles Bronson (Bernardo), Robert Vaughn (Lee), Brad Dexter (Harry) and James Coburn (Britt)? "

And do you know the answer to this one? "What does an astronaut experience in space that causes muscle weakness if exposed too long?"

76% knows the answer to this question: "Of these, which was a popular children's show from 1997? "

And do you know the answer to this one? "What Ford car was nicknamed the "Tin Lizzie"?"

49% knows the answer to this question: "What type of eye surgery can correct near-sightedness? "

And do you know the answer to this one? "Which country launched the health care exchange for its Affordable Care Act in 2013?"

88% knows the answer to this question: "The Rocky Mountains are in which continent? "

And do you know the answer to this one? "You can find the Wailing Wall at which location?"

52% knows the answer to this question: "What group recorded the most well-known version of the 12-bar-blues-based song "Rock Around the Clock" in 1954? "

And do you know the answer to this one? "What was the head of state in Iran called before the revolution of 1979?"

72% knows the answer to this question: "James Butler Hickok was better known by which name? "

And do you know the answer to this one? "Which leader of China died in 1976?"

67% knows the answer to this question: "Three of these are metals - which is the odd one out? "

And do you know the answer to this one? "In which major world event was Britain involved between 1914 and 1918?"

55% knows the answer to this question: "What is the total of 159 + 33 + 48? "

And do you know the answer to this one? "How many seconds in 10 minutes?"

84% knows the answer to this question: "What is the acronym for British Thermal Unit? "

And do you know the answer to this one? "What "white ants" can be told apart from real ants because they have thick waists?"

58% knows the answer to this question: "Which word is spelled wrong? "

And do you know the answer to this one? "Which word is spelled wrongly?"

95% knows the answer to this question: "What liquid substance, invented in 1926, is added to a car's cooling system? "

And do you know the answer to this one? "In 1991 Margot Fonteyn died at the age of 71. In which field had she found fame?"