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

[EX Q]: Sediment consists of _ visually distinct floc layers.
[EX A]: two

[EX Q]: Postpartum blues are common during the _ months after childbirth.
[EX A]: three

[EX Q]: Symbols are important in a country where _ in three people are illiterate.
[EX A]:
one