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

[Q]: Young groundhogs are weaned and ready to seek their own dens at _ to six weeks of age.
[A]: five

[Q]: Pets also track in pollen, and _ out of every ten people is allergic to cat or dog dander.
[A]: one

[Q]: Charged batteries give _ hours of light with full charge.
[A]:
two