Comment I've used them, but not in the convential way (Score 2) 672
When interview product support people, I've used some extremely hard puzzle questions as a test, but I'm never looking for a correct solution - I'm watching to for signs of freezing/panic when confronted with something unexpected, and I'm looking for the applicant to be able to: ask clarifying questions if needed, remain calm, and when presented with a portion of the answer, be able to apply it further. But that's partly because the job was support of a complex product with a large number of components that can interact in unexpected ways. Being blindsided by a customer question isn't uncommon, and being able to reason through the process and explain the steps as needed meant that the customer wouldn't have to call back a week later having gotten themselves into the same boat again.