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

[EX Q]: Plants have many white flowers with _ petals, giving the plant a white, flat-topped appearance.
[EX A]: four

[EX Q]: House wrens are small birds, four and a half to _ and a four inches in length.
[EX A]: five

[EX Q]: Insects have _ pairs and arachnids have four pairs of limbs.
[EX A]:
three