Raymond Friend
@raymigo
Riddle: me & you are given hats each with a positive integer on them. We can only see the other person’s hat, no talking. We each are allowed to write finitely many numbers on our own piece of paper. If at least one of us wrote down our own number, we both win! How to guarantee a win? https://i.imgur.com/JVFvf9U.jpg
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Raymond Friend
@raymigo
To be clear: you get to write as many numbers as you want on the paper, but only get to “submit” or check it once.
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