The Knight and the Dragon
A knight encountered a dragon with three heads on his way and they began to fight. Every time the knight chops off one of the dragon's heads, three new heads appear in its place. Is it possible that at the end of the battle, the dragon will have a thousand heads?
Difficulty level (1 very easy - 10 very hard): 2
Topics:
Combinatorics
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Invariants
Logic
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Reasoning / Logic
Number Theory
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Division
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Parity (Even/Odd)
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