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

[EX Q]: Knives have _ cutting edges for double cutting life.
[EX A]: two

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

[EX Q]: Water is the only substance that occurs naturally in all _ states.
[EX A]:
three