Can you answer the hardest questions in Who Wants to Be A Millionaire history?

So here at RadioTimes.com we thought we'd pay tribute to the series, by compiling some of its trickiest questions. All of the questions below were used as million pound questions on the show. Test yourself, phone a friend if you need to and then decide what your final answer will be.

Once you’re done, why not try our TV pub quiz, film pub quiz, music quiz or sport pub quiz for size? Plus there's many, many more pub quizzes available as part of our bumper general knowledge pub quiz.

Now in the words of Chris Tarrant, "Let's play, Who Wants to be a Millionaire!"

Who Wants To Be A Millionaire's Hardest Questions

1. Which county cricket side is based at Chester-le-Street? A) Warwickshire, B) Durham, C) Northants, D) Leicestershire?
2. Which monarch was known as 'the wisest fool in Christendom'? A) James I, B) Charles I, C) Edward I, D) Henry I
3. Which king was married to Eleanor of Aquitaine? A) Henry I, B) Henry II, C) Richard I, D) Henry V (this was Judith Keppel's million pound question, the show's first ever millionaire winner)
4. Oberon is a satellite of which planet? A) Mercury, B) Neptune, C) Uranus, D) Mars
5. In 1912, former US President Theodore Roosevelt was a candidate for which political party? A) Bull Moose, B) Bull Dog, C) Bull Elephant, D) Bull Frog
6. Tomas Masaryk was the first President of which country? A) Czechoslovakia, B) Poland, C) Hungary, D) Yugoslavia
7. If you planted the seeds of 'Quercus robur' what would grow? A) Trees, B) Flowers, C) Vegetables, D) Grain
8. A number 1, followed by one hundred zeroes is known by what name? A) Googol, B) Megatron, C) Gigabit, D) Nanomole (this was Charles Ingram's million pound question)
9. Which scientific unit is named after an Italian nobleman? A) Pascal, B) Ohm, C) Volt, D) Hertz
10. What was the profession of composer Borodin? A) Naval captain, B) Chemist, C) Lawyer, D) Chef
11. Which of these is a butterfly, not a moth? A) Mother Shipton, B) Red Underwing, C) Burnished Brass, D) Speckled Wood
12. Which of these is not one of the American Triple Crown horse races? A) Arlington Million, B) Belmont Stakes, C) Kentucky Derby, D) Preakness Stakes
13. Who was the first man to travel into space twice? A) Vladimir Titov, B) Michael Collins, C) Gus Grissom, D) Yuri Gagarin
14. Which boxer was famous for striking the gong in the introduction to J. Arthur Rank films? A) Bombardier Billy Wells, B) Freddie Mills, C) Terry Spinks, D) Don Cockell
15. Which of these UK prime ministers never served as foreign secretary? A) Winston Churchill, B) Alec Douglas-Home, C) Anthony Eden, D) Harold Macmillan

The Answers

1. B) Durham
2. A) James I
3. B) Henry II
4. C) Uranus
5. A) Bull Moose
6. A) Czechoslovakia
7. A) Trees
8. A) Googol
9. C) Volt
10. B) Chemist
11. D) Speckled Wood
12. A) Arlington Million
13. C) Gus Grissom
14. A) Bombardier Billy Wells
15. A) Winston Churchill

Who Wants to Be A Millionaire is on ITV tonight at 9pm. To find out what else is on this evening, check out our TV Guide.