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How many five-digit integers are perfect squares?

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    The smallest 5-digit number is 10000 and its square-root is 100.

    The largest 5-digit number is 99999 and its square-root is 316.23.

    Thus the square of all integers between 100 and 316 inclusively will yield a perfect square between 10000 and 99999.

    How many integers are there?

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