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Principle Describe and accurately recreate a layout of geometric shapes.

Principle Create a paving

Principle Put the 5-square pieces back

Principle Create the polygon with the greatest number of edges possible using only straws and paperclips.

Principle Fill in the missing squares with dominoes representing the indicated sum.

Principle Starting with a rectangle, keep cutting out the largest possible squares and see what’s left.

Principle Estimate how many macaroni pieces can fit in one cubic meter.

Roll the dice and move around the clock. With just two pieces of information, I’ll find the value of the first die. But how did I do it?

The magician predicts the total that will be obtained. How does she do it?

With a few counters, some multiplications, and just one revealed piece of information, the magic happens!

Let’s play with two colors and sort the shuffled cards. With just one question, the magician will impress you.

A simple balloon-shaped path hides a surprising magic trick. Can you figure it out?