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Because it's 11, and 11 is a rational number.

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Q: Why is the square root of 121 a rational number?

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The square root of 121 is 11, and 11 is a rational number.

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The square root of 121 is 11 which is a rational number and also a prime number

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Rational

Yes - the square root of 121 is equal to Â±11.

No it is not. It is not irrational either but is an "imaginary" number.

irrational square root of 121 = 11 square root of 1.21 = 1.1 square root of 12.1 = 3.47...

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