The King William's College quiz is set by a particular fee paying English school for its pupils every Christmas and published by the Guardian. Its full of English cultural references and designed to be hard. I assume the idea is that the pupils take it home for the holidays and work on it with their families. Each section has a theme that connects the answers in that section. My partner's family love wrangling out the odd answer or three between christmas and new year.
blacksmith_tb|4 years ago
1: https://en.wikipedia.org/wiki/King_William%27s_College#Gener...
GFlaneur|4 years ago
mattsouth|4 years ago
quartesixte|4 years ago
That being said, the internet has probably made a test like this easier than it has been in the past. Although I dare say many of the answers will require Google-fu/Wikipedia wizardry of a quite high level.