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A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 21 is composite.
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Related questions
Is 21 a prime number of composite?
21 is a composite number
Is number 21 prime or composite?
number 21 is prime
Is 21 a composite number or prime number?
Composite
Is 21 prime or a composite number?
Composite.
Is 21 a prime number or a 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.
Is 21 a prime or composite number?
Composite, 21=3*7
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!
21 a prime or a compostie?
21 is a composite number.
Is 21 prime or compostie?
21 is a composite number.
Is the number 21 prime composite or neither?
3 * 7 = 21 21 is not prime
Is 21 and 31 a prime number?
21 is composite number that is a multiple of 3. 31 is a prime number.
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