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Q: Is the square root of 21 rational?

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No because it is 2 times the square root of 21 which is an irrational numberThe square root of 84 is not a rational number

Yes because 21 is a rational number

irrational

It is equal to 21/2 which is a rational number

The square root of 25 is 5 ... rational.

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is the square root of 3 rational

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The square root of 4 is 2. 2 is a rational number so they square root of 4 is rational.

irrational, it has a never ending decimal

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