How many odd perfect squares are between 5 and 211?

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How many odd perfect squares are between 5 and 211?
How many odd perfect squares are between 5 and 211?

How many odd perfect squares are between 5 and 211?
3的平方数是9
14的平方数是196
这之间3、5、7、9、11、13的完全平方数是奇数
因此有6个
答案是there are six odd perfect squares between 5 and 211.

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