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Yes, albeit an irrational number

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Q: Is the square root of 21 a real number?
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Related questions

Is the square root of 21 a rational number?

No. The square root of an integer is either an integer, or an irrational number.


Is the square root of 84 a rational number?

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


What is the square root of 21?

The square root of 21 is 4.58257569495584.


What are the square root of 21?

The square roots of 21 are 4.5826 (rounded) and the negative of the same number.


What is the square root of 84 simplify?

It is: 2 times the square root of 21 and it's an irrational number


What is an Adams number?

If the reverse square root of the reverse of square of a number is the number itself then it is Adam Number. For ex., 12 and 21 Take 12 square of 12 = 144 reverse of square of 12 = 441 square root of the reverse of square of 12 = 21 The reverse square root of the reverse of square of 12 = 12, then number itself. Such number is called Adam Number. cool....................


Square root of 21?

The square root of 21 is 4.58257569495584.


Is the square root of 441 a rational number?

Yes because 21 is a rational number


Is the square root of 21 an irrational or a rational number?

irrational


Is the square root of 5 and squa re root of 21 irrational?

Yes. The square root of a natural number (positive integer) is either an integer, or an irrational number.


What is and irrational number between 4.5 and 4.6?

the square root of 21


Is 4.5 the square root of 21?

4.6 is a better approximation to the square root of 21.