In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
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Question: Eagles attain their adult plumage at _ or five year of age.

Answer: four

Question: Urushiol oil can be active on any surface for _ years and possibly longer.

Answer: five

Question: Intermediate purgatory possesses _ chambers containing either ice, boiling oil or molten metal.

Answer:
three