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23 is prime. 21 is composite as it is 7x3. A Prime number has only 2 factors which are 1 and itself. Composite numbers are every other positive integer except 1 and 0. 1 and 0 are neither prime, nor composite.
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Is 19 21 or 23 composite?
21 is composite. 19 and 23 are prime.
What is a composite number 21 55 77 93 23?
21, 55, 77, and 93 are composite numbers. 23 is a prime.
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.
Is the numbers 19 21 and 23 a composite number?
No, the numbers 19, 21, and 23 are not composite numbers. A composite number is a positive integer greater than 1 that has more than two distinct positive divisors. In the case of these numbers, 19 and 23 are prime numbers because they are only divisible by 1 and themselves, while 21 is a composite number because it has divisors other than 1 and itself (3 and 7).
Is 15 17 19 21 23 25 27 29 and 31 prime or composite?
17, 19, 23, 29 and 31 are prime. 15, 21, 25 and 27 are composite..
