QI is a British TV quiz show. In this recently-uploaded episode from last Christmas, they took advantage of the word "noel" to ask questions in which the answer contained ...no "N." I guess finding words with no "L" was too easy. Christmas explains the red hats, even though your first thought would be dunce caps. Anyway, the first question asked for a yellow tropical fruit with no "N." That's easy -papaya! Or grapefruit, jackfruit, or starfruit. Their answer is guava, which isn't even yellow. There are other questions which may or may not stump you.
This shows the big difference between game shows in Britain and the US. Americans are quite hung up on technicalities because we are competitive, and our shows involve a lot of prize money. Game shows in Britain (and Japan) are all about the entertainment value, and the contestants are regulars or celebrities who don't need to win.