A Fly in his CoffeeSituation puzzles (sometimes called lateral thinking puzzles) are ones where you need to ask lots of yes or no questions to figure out what happened in the situation. These are good puzzles for groups where one person knows the puzzle and answers the questions.
A man found a fly in his coffee and sent his coffee back to the kitchen. When the waiter returned with a new cup of coffee, the man took a sip and immediately knew that the waiter had just removed the fly and given him back the same cup of coffee. How did the man know that he wasn`t served a fresh cup of coffee?
AnswerBefore the man had noticed the fly, he had added sugar to his coffee. When the waiter returned with the supposedly new cup of coffee, the man took a sip, noted it was sweet, and knew that the waiter had just removed the fly and served him the original coffee.
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