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The Invertible Trefoil

Age 14 to 16
Challenge Level

A good start is to make the knots you can see on the problem page.

The thicker the string the easier it is to see the 'shape' of the knot.

Rope is very good, and a tube length can be joined to make a complete circuit.

This is good new mathematics so be prepared to invest a bit of time getting equipped so you can enjoy exploring these ideas.