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

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

[EX Q]: Education wastes about _ thirds of the talent of society.
[EX A]: two

[EX Q]: Prostate cancer can cause symptoms in _ main ways.
[EX A]:
two