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: Carbon dioxide accounts for _ fourths of the predicted increase in the greenhouse effect.

A: three
****
Q: Most ovarian cysts go away on their own in one to _ months without causing any problems.

A:
three
****