In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
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Question: Jurassic rocks have _ outcrops in the area but they are identified by bore holes.

Answer: no


Question: Most insects have _ wings, but dipterans have only two.

Answer: four


Question: Arthritis is the leading cause of disability in the state affecting about _ in three adults.

Answer:
one