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

[Q]: Most amphibians reach maturity at three or _ years.
[A]: four


[Q]: Women devote their lives to raising families of six, seven and _ children.
[A]: eight


[Q]: Footprints are the size of an elephant and has _ toes or claw marks.
[A]:
three