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Twin A | Twin B |
Here is a Word document with the Twin Sudoku that you can download.
figure 1 | figure 2 | figure 3 |
Given the nets of 4 cubes with the faces coloured in 4 colours, build a tower so that on each vertical wall no colour is repeated, that is all 4 colours appear.
Label the joints and legs of these graph theory caterpillars so that the vertex sums are all equal.