In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Sea urchins have _ paired rows of tiny tube feet which are found amongst the spines.
[EX A]: five

[EX Q]: Osteoporosis is _ to four times more common in woman than men.
[EX A]: three

[EX Q]: Crabs usually walk sideways on their _ pairs of legs.
[EX A]:
five