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

Q: Many Asian countries deny entry to travelers whose passports are valid for less than _ months.

A: six
****
Q: Humans are bipeds who stand between _ to six feet in height when fully grown.

A: five
****
Q: Sea cucumbers have between _ and thirty such tentacles , depending on the species .

A:
ten
****