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Earn +20 ptsQ: Is 21 a square number itself?
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Is the number 21 composite square or prime?
21 is a composite number because it has at least one positive factor other than one or itself.
Is 21 a square number?
21 is not the square of an integer. The closest square number is 25.
What is square root of a number?
The square root is the number which is times by itself, to get the square number.
Is number 21 a square number?
no
What does 2 to the half power equal?
21/2 = √2 ≈ 1.414 The rules of indices are that when multiplying add them. 21/2 x 21/2 = 21/2 + 1/2 = 21 = 2 So multiplying 21/2 by itself gives 2. But what number multiplied by itself gives 2? The answer is the square root of 2. Thus 21/2 is the square root of 2.
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