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

Q: Woodchucks can dig up to three entrances to _ den.

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

A: one
****
Q: Water seems magical because it changes form and is found in _ states of existence.

A:
three
****