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

[EX Q]: Cubs emerge from the den when they are four to _ months old.
[EX A]: six

[EX Q]: Many people only have _ or two hives.
[EX A]: one

[EX Q]: Actuators come in _ sizes, to move the body, legs and arms respectively.
[EX A]:
three