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No, they are three numbers, not one. 21 is composite.
Wiki User
∙ 7y ago
Wiki User
∙ 7y ago21 is composite, 19 nd 23 are prime.
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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.
Which one is a composite number 3 7 19 21?
3, 7, and 19 have only two factors, 1 and itself. They are prime numbers. 21 has more than 2 factors: 1, 3, 7, and 21. It is a composite number.
Which of these numbers is not composite 15 18 19 20 21?
19. It is prime.
What are 21's composite numbers?
The factors of 21 are 1, 3, 7, and 21. The only factor of 21 that is a composite number is 21.
Which number is a composite number 47 13 17 21?
21 is a composite number, as it can be divided by 7 and 3. The other three numbers are prime numbers and do not divide into anything besides themselves.
Is 10 19 21 62 composite numbers?
19 is prime number. 10, 21 and 62 are composite numbers.
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.
Which is a composite number 19 21 23?
21 is composite.
Which one is a composite number 3 7 19 21?
3, 7, and 19 have only two factors, 1 and itself. They are prime numbers. 21 has more than 2 factors: 1, 3, 7, and 21. It is a composite number.
Which of these numbers is not composite 15 18 19 20 21?
19. It is prime.
What is the meaning of a consecutive composite number?
21 and 22 are consecutive composite numbers.
What are 21's composite numbers?
The factors of 21 are 1, 3, 7, and 21. The only factor of 21 that is a composite number is 21.
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.
Which number is a composite number 47 13 17 21?
21 is a composite number, as it can be divided by 7 and 3. The other three numbers are prime numbers and do not divide into anything besides themselves.
Is 19 21 or 23 composite?
21 is composite. 19 and 23 are prime.
Is the addition of two composite numbers also a composite number?
Not necessarily. For example 15 and 16 are composite numbers. They add to 31, which is a prime number. Similarly, the composite numbers 20 and 21 add up to 41, which is a prime number.
Which of these numbers are composite 4 11 19 21 31 43 51 67 79?
4, 21
