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21 is a composite number. 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.
Wiki User
∙ 12y ago
Wiki User
∙ 7y ago1, 3, 7 and 21 which makes it composite.
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Is 21 a prime composite or neither number?
21 is a composite number because it has more than two factors
Are these numbers prime or composite 21?
21 is a composite number. 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.
What are the prime numbers from 1 to 21?
1isn't prime or composite. So 2,3,5,7,11,13,17,19 are all prime because there only factors are 1 and itself.
Is 21 a prime number of composite?
21 is a composite number
What are the factors of 24 and is it prime or composite?
Composite. 1,2,3,4,6,8,12,24
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.
Is 23 21 19 prime or composite?
19 is a prime number. Its only factors are 1 and 19. 21 is a composite number. Its factors are 1, 3, 7, and 21. 23 is a prime number. Its only factors are 1 and 23.
List all the factors of 21 is the number 21 prime or composite?
The factors of 21 are 1, 3, 7, and 21 which means that 21 is composite.
Is the prime number 21 is a prime number?
21 is a composite number, not a prime, having prime factors 3x7.
Why is 21 composite and not prime?
21 has the factors 21,1,7,3. 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.
Is 21 a prime or composite number why?
composite because it has more than two factors.
Is 21 a prime composite or neither number?
21 is a composite number because it has more than two factors
Is this number prime or composite 21?
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.
Is 21 composite or prime?
21 is composite. It's the product of 7 and 3 .
Is there a prime number that is a multiple of 21?
No, it is not possible. Every multiple of 21 is a composite number. 21 is a composite number and its factors are 1, 3, 7 and 21(4 factors). Any multiple of 21 must have all the factors of 21. So, every multiple of 21 has at least 4 factors. And a prime number has only two factors so, any multiple of 21 can't be prime.
Are these numbers prime or composite 21?
21 is a composite number. 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.
Is 21 an prime or composite number?
It is a composite number because it has more than two factors
