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Label the joints and legs of these graph theory caterpillars so that the vertex sums are all equal.

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Product Sudoku 2

Stage: 3 and 4 Challenge Level: Challenge Level:1

Rosie and Zoe solved this Sudoku. Their journey can be found here.

They kept a record of the order in which they filled the Sudoku and wrote it in the boxes. This is just one possible route through the problem.