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

[Q]: Most orangutans are _ to five feet long, some can reach a length of six feet.
[A]: four


[Q]: Bull sharks are a 'requiem' species, reaching up to _ feet in length.
[A]: ten


[Q]: Elderly populations are also skewed, with more than _ women for each man at some ages.
[A]:
four