HMMT 2009 S1
- Team 2
- Answer
What are the chromatic numbers of each of the three graphs shown below? Draw a coloring having the minimum number of colors for each. Label the vertices with symbols to indicate the color of each vertex. (For example, you may mark a vertex "R" if you wish to indicate that it is colored red.)
Dataset text NuminaMath olympiads. Quoted with source.
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3, 5, 2
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