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

[Q]: Mental illness affects _ out of four families in America.
[A]: one


[Q]: Some manatees have _ or four nails on the tip of each flipper.
[A]: three


[Q]: Most cats have only _ to five toes per paw, depending on whether it is the front or back paw.
[A]:
four