SOLUTION: "Are all square roots irrational numbers?"

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Question 84767: "Are all square roots irrational numbers?"
Answer by Edwin McCravy(20059) About Me  (Show Source):
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"Are all square roots irrational numbers?"
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No because
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sqrt%284%29 = 2 which is rational.
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sqrt%2825%29 = 5 which is rational.
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sqrt%2849%2F81%29 = 7%2F9 which is rational.
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However many are irrational, such as
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sqrt%282%29 which has decimal approximation 1.414213562373...
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and the decimal never repeats a block of digits.
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Same for sqrt%2810%29 which has decimal approximation 3.162277660168...
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and this decimal also never repeats a block of digits.
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But the answer to your question is no, many square roots are rational.
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Edwin