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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.
Is the numbers 19 21 and 23 a composite number?
No, they are three numbers, not one. 21 is composite.
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 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..
Is 19 21 or 23 composite?
21 is composite. 19 and 23 are prime.
Which is a composite number 19 21 23?
21 is composite.
Is the numbers 19 21 and 23 a composite number?
No, they are three numbers, not one. 21 is composite.
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.
What is 18 19 20 21 22 23 24 25 are they composite or prime?
All the numbers are composite except the ones in bold: 18 19 20 21 22 23 24 25.
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..
Are 4 11 13 17 21 22 23 composite?
Some are, some are not.
Is 21 a prime or composite?
21 is composite.
What is the composite number for 21?
The only composite factor of 21 is 21.
All the composite numbers 1-23?
The composite numbers from 1 to 23 are 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, and 22.
A prime from 27 15 21 23?
27 is composite. 27 = 3 * 3 * 3 = 3315 is composite. 15 = 3 * 521 is composite. 21 = 3 * 723 is a prime number. It is only evenly divisible by itself and one.
