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

[EX Q]: Carbon dioxide extinguishes fire by physically attacking all _ points of the fire triangle.
[EX A]: three

[EX Q]: Oceanographers now understand the oceanic circulation much better than _ years ago.
[EX A]: ten

[EX Q]: Tadpoles hatch within _ days.
[EX A]:
two