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: Differentiation is caused by the energy going in ____ directions.

Answer: two


Question: ATMs are expensive machines with an average useful life of ____ to fifteen years.

Answer: ten


Question: Water lilies vary in cover from ____ to twenty-four square feet each.

Answer:
four