A mole burrowed to make some underground rooms connected by tunnels so that each room had 3 tunnels from it, each tunnel leading to a different room. No two tunnels intersect (though one may pass under another). Among any 3 rooms, there are 2 of them which are not directly connected.
Prove that the mole can make 6 rooms with connections obeying these rules.
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Another hard maths problem - Combinations + Logic watch
- Thread Starter
- 03-03-2016 23:26