Math Puzzle: Find the Unknot
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A chain in each of the following pairs can be untangled in a circle – the so -called unknown. Which one is it?
Nodes at the top left and bottom right can be untangled in circles:
Challenge problem: the other two nodes, which cannot be completely detailed, can each be made to look like one of the four most basic knots. Identify them!
The upper right node is equivalent to node 2, and the bottom left is equivalent to node 4.
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