Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.
--------
Question: Sexual reproduction involves the union of cells from ____ parents.

Answer: two


Question: Harpists spend ninety percent of their lives tuning their harps and ____ percent playing out of tune.

Answer: ten


Question: Cords begin to form between the ages of six and ____ months.

Answer:
nine