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

Q: Oceanographers now understand the oceanic circulation much better than _ years ago.

A: ten
****
Q: Horse chestnuts have opposite branching and a compound leaf, which is palmate, with _ leaflets.

A: five
****
Q: Elves are bipeds and usually grow to heights of greater than _ foot.

A:
six
****