How many natural numbers lie between 80^(2) and 81^(2)
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https://www.meritnation.com/ask-answer/question/how-many-natural-numbers-lie-between-24-square-and-25-square/squares-and-square-roots/10360213
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https://www.meritnation.com/ask-answer/question/how-many-natural-numbers-lie-between-24-square-and-25-square/squares-and-square-roots/10360213
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