69% knows the answer to this question: "Where was the world's first human heart transplant performed in 1967? "

And do you know the answer to this one? "What is a name for a portable machine that records the heartbeat?"

87% knows the answer to this question: "Who founded and built Daniels Cable-vision? "

And do you know the answer to this one? ".ru is the top-level domain name for which country?"

66% knows the answer to this question: "What do we call the teeth we grind our food with? "

And do you know the answer to this one? "What are the scientists that study life from long ago called?"

69% knows the answer to this question: "What central London street is famous for containing the main government offices? "

And do you know the answer to this one? "Sapphire is usually which colour?"

30% knows the answer to this question: "What King's Mines was the title of a popular 1950 movie starring Deborah Kerr? "

And do you know the answer to this one? "Which US President approved the spend on The Apollo Space program in the '60s?"

75% knows the answer to this question: "Which of these cities has four buildings in the top ten tallest buildings in the US? "

And do you know the answer to this one? "Persia was conquered by which Greek?"

65% knows the answer to this question: "What do the Robinson's build to live in, in the "Swiss Family Robinson"? "

And do you know the answer to this one? "What best-selling book is about a hot puzzle craze first originating in Japan?"

49% knows the answer to this question: "Who sang the famous song Radio Song (1991)? "

And do you know the answer to this one? "Who sang the song, "Rock Lobster"?"

52% knows the answer to this question: "Which hot green paste, often served with sushi and sashimi, is called "Japanese Horseradish"? "

And do you know the answer to this one? "What "peach of the tropics" is used in chutney?"

82% knows the answer to this question: "Dermabrasion is a cosmetic procedure on which part of the body? "

And do you know the answer to this one? "A person with diabetes produces an insufficient amount of what in the body?"

49% knows the answer to this question: "Which one these continent, country and capital groups is correct? "

And do you know the answer to this one? "Which country is home to the Okavango Delta, a rich source of African wildlife?"

33% knows the answer to this question: "What song by U2 is about "The Troubles in Northern Ireland"? "

And do you know the answer to this one? "What type of animal is a dog?"