Puzzles in interviews are worthless unless the potential job involves doing those same kind of puzzles. If you want to see how someone's mind works, you could, say, talk through solving a real-world problem as if you were pair-programming. But don't use puzzles are brain-teasers. They don't tell you anything practical.

If the puzzles are "why are manhole covers round?" I agree.

If the puzzles are "given a list of N integers, positive and negative, find the consecutive subset with the most negative sum" then I want to see how they come up with an answer.