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

Q: Babies can range in age from newborn up to _ years old.

A: three
****
Q: Rye grasses germinate in _ days.

A: six
****
Q: Ringed seals are the main prey of polar bears that catch about one seal every _ and a half days.

A:
six
****