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

[Q]: Death usually occurs by five to _ years of life due to pneumonia or other infections.
[A]: eight


[Q]: Climatic regions Contrasts between the interior and the coasts produce _ main climatic regions.
[A]: six


[Q]: Tigers can see about _ times as well in the dark as a human.
[A]:
six