Puzzle 118 - Handshake

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 This one is quite an interesting puzzle. I took the help of chatGPT to solve. Even then it took a while to understand the solution.


You are at a dinner party with 5 couples. That evening, no person shakes hands with their partner. At the end of the party, you ask all 9 other people how many different hands each shook, and get 9 different responses. How many hands did your spouse shake?

 

You can find the solution here.  

 

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