The square root of 20 is an irrational number
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The square root of 9 is 3 which is a rational number
The square root of an irational number must, itself, be irrational.
The square root of 64 is 8 which is a rational number
No, the square root of 1500 is not a rational number.
The square root of 25 is 5 which is a rational number * * * * * Or -5, which is also rational.