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

[Q]: Southern moles are six to _ inches long and weigh three to four ounces.
[A]: seven


[Q]: Zeolites have basically _ different structural variations.
[A]: three


[Q]: Cockroaches require food every seven to ten days but mut take in water every _ days.
[A]:
ten