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No, 21 is not a Prime number. It can be divided evenly by numbers other than 1 and itself, such as 3 and 7.
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Is 21a prime or composite number?
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Is 21a prime number or a composite?
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You is called a prime number!You is called a prime number!You is called a prime number!You is called a prime number!
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Why 7 is not a prime number?
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