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.
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Question: Most orthoptists work ____ hours a day, four or five days a week.

Answer: eight

Question: Echinoderms have radial symmetry , many having ____ or multiples of five arms.

Answer: five

Question: Hawks have ____ toes pointing forward and one pointing backwards.

Answer:
three