"Well, George, I've got a tricky one for you today. Lots of people struggle to get into it. They think it's about real human behavior but it's set up for logicians."
George looked at me blanking not seeing the difference.
"Anyway, here's the puzzle. There are 5 people..." I described the puzzle for him and folded my arms with a smile.
He squinted his eyes at me in disbelief that I would ask such a simple question. Then shrugged and said: "Well, 1 is 100; 2 is 0; 3 is 99; 4 is 97; and 5 is 97. So that's the answer."
I was flummoxed that he'd solved it so easily. In desperation, I asked him how it would continue and he immediately said, "It will drop by 1 every other person from now on until it gets to 0."
What was the puzzle I gave him?