Eggheads, the fiendish quiz show in which members of the public test their wits against quizzing legends, turns 15 later this year.
Originally presented by Dermot Murnaghan and now fronted by Jeremy Vine, the show has given us nearly 2,000 episodes of brain-teasing joy.
But could you take on the Eggheads, and walk away with your dignity intact? Here are 25 questions which they themselves got wrong.
Can you get them right?
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[Main image: BBC]