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The Time Master

Tick tock! What time is it? Time to find your number!

Tick tock! As you make your way around the clock, the magician eliminates more and more numbers… until he finds yours! How can he do that?

Impressive! Intriguing! The perfect trick to perform with the whole class. Everyone will be surprised by the outcome. Does it always land on the same final number? You’ll have to think long and hard about it!

  • This trick doesn’t require any prior knowledge—yes, that’s possible! The performance is short, the operations are simple, and the spectator is actively involved in the process. Use the corresponding GeoGebra to do the activity with the whole class. In a few words, this trick is simple, thorough, dynamic and fun!

  • Planning notes