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The Rings

Can you tell bronze from gold?

Quick! Time is money! How can you identify the bronze ring in only three weighings? Thankfully, Mr. Bolzano is a mathematician and he knows what to do! How does he do it?

You can use a real scale to solve this puzzle, or tokens or objects on which you write values. Get ready to have fun!     

  • This puzzle can be difficult and requires a fairly unusual reasoning.

  • Planning notes