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

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

[EX Q]: Liquids usually descend in three to five seconds, and solids in _ to twenty seconds.
[EX A]: eight

[EX Q]: Ocean water contains _ times more salt than the human body can safely ingest.
[EX A]:
seven