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9 Cards

Give me a digit and… here’s your card!

The spectator picks a card and a digit. What do you know! The magician has found the card! Where was it? Exactly in the spot indicated by the digit. But how did she do it?

In this trick, the magician handles the cards strategically so the card the spectator picked ends up in the spot indicated by the digit. To discover how it’s done, you must pay close attention to the differences that appear when the magician performs the trick a second time. Is it logic or arithmetic? Ask your friends to help you with this one!


  • If you want to throw your students a challenge that involves mathematical logic, this mathemagic trick is perfect. They will have to rack their brains to understand how it works. The person performing the trick also has to think about what they are doing.

  • Planning notes

  • If you want to throw your students a challenge that involves mathematical logic, this mathemagic trick is perfect. They will have to rack their brains to understand how it works. The person performing the trick also has to think about what they are doing.

  • Planning notes