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: Sharks have ____ gill slits on each side of the head.

Answer: five


Question: Fire occurs any time ____ elements are present - fuel, heat, oxygen and the chemical chain reaction.

Answer: four


Question: Quadratic elements have ____ nodes per element, rather than three.

Answer:
six