Stage: 5
Here is one way of arranging four people (blobs) with ribbons (lines) between them, so that the ribbons don't overlap.
Working systematically. Euler's formula. Stage 5 - Reviewed 2012. Combinatorics. Networks/Graph Theory. Mathematical modelling. Games. 2D representations of 3D shapes. Mathematical reasoning & proof. chemistry.
Published May 2006.
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