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Mystery Grid

This grid is so mysterious, only maths can explain it!

How can you find the sum of randomly picked numbers without looking at them?

Is it an illusion? Magic? Use your powers of observation to solve this mystery!

This remarkable trick, which focuses on regularity, is performed using a simple calendar. It’s perfect to introduce kids to mathemagic and for teamwork.

  • This trick requires little preparation. The magician doesn’t have to make any calculations. Once your students have solved the trick, you can challenge them to create a new mystery grid.

  • Planning notes