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

[EX Q]: Intramural football consists of _ leagues.
[EX A]: three

[EX Q]: Grasshoppers develop through _ to six instars.
[EX A]: five

[EX Q]: Rabbits have _ incisors in the upper jaw where rodents have only two.
[EX A]:
four