Question 23
In how many ways can the vertices in the diagram be coloured with three colours so that any two neighbouring vertices have different colours?
Interpretation: The three colours are distinguishable; vertices stay in their drawn positions. Neighbours are endpoints of a drawn edge. Colourings related by rotation or colour renaming are not identified.
Answer format: an integer without units. Leading zeros are optional; the source uses four digit boxes.
Interpretation: The three colours are distinguishable; vertices stay in their drawn positions. Neighbours are endpoints of a drawn edge. Colourings related by rotation or colour renaming are not identified.
Answer format: an integer without units. Leading zeros are optional; the source uses four digit boxes.