In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
--------
Question: Osteoporosis is _ to four times more common in woman than men.

Answer: three


Question: Dwarf trees are diminutive and shrub-like, reaching _ feet or so at maturity.

Answer: four


Question: Cats can also suffer from _ serious diseases of the eye, all of which can progress to blindness.

Answer:
three