King William's College Quiz 2004-2005 (PDF) has the reputation for being the hardest quiz in the world. It's also the hundredth edition, and they've made it extra hard this year! For what it's worth, here's last years Questions and Answers.
King William's College Christmas Quiz - Pupils at King William's college on the Isle of Man have suffered its annual general knowledge quiz since 1905. Until 1999, it was compulsory and the average score was two (out of 180). Nowadays the questions, set by an unidentified islander, are posted to parents with the end-of-term report. See how you fare. Answers will be posted in the new year. (last year, last years answers).