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

[EX Q]: Diatoms look like _ shells that fit together.
[EX A]: two

[EX Q]: Sexual maturity occurs at _ years of age.
[EX A]: ten

[EX Q]: Limousines can seat up to _ passengers, while sedans seat three people.
[EX A]:
ten