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

[EX Q]: Pancreatic juice is of _ types.
[EX A]: two

[EX Q]: Some dentists prefer using the oral rinse for _ to five days at a time.
[EX A]: three

[EX Q]: Fruit is a silique opening by _ valves.
[EX A]:
two