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

[EX Q]: Bifocal lenses have _ distinct segments with different powers.
[EX A]: two

[EX Q]: Horse chestnuts have opposite branching and a compound leaf, which is palmate, with _ leaflets.
[EX A]: five

[EX Q]: Carbon monoxide remains in the blood for up to _ months after death.
[EX A]:
six