This question already has an answer here:
Original: puzzling.se question
The OP was given the following question as part of an interview:
Find the next letter in the sequence: H,A,H,L,U,?
My question is, What possible value could this type of question have for making a hiring decision?
I can see more obvious patterns being a screener for baseline knowledge, but I really can't see "Trick Questions" being useful.