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Earn +20 ptsQ: Is the number 21 composite square or prime?
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Is number 21 prime or composite?
number 21 is prime
Is the prime number 21 is a prime number?
21 is a composite number, not a prime, having prime factors 3x7.
Why is 21 a prime number?
Who says it is? 21 is a composite number!
Is 21 and 31 a prime number?
21 is composite number that is a multiple of 3. 31 is a prime number.
Is 21 a prime or composite number?
21 is a Composite Number. A prime number is a whole number that only has two factors which are itself and one. A composite number has factors in addition to one and itself. 21 is divisible by 3 and 7.
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