The number 1 is neither prime nor composite. The numbers 25, 16, 21, and 27 are divisible by factors that are not one or the number itself. 19 is the only one that has only 1 and itself as factors, so it is a Prime number.
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Which is a prime number 16 21 19 18?
19 is prime.
What is the prime number of 16 27 13 19 21?
They are 13 and 19 which are prime numbers
Which one is a prime number 19 21 or 23?
19 and 23 are prime.
Which of these numbers are prime 13 16 19 21?
13 and 19.
Which number is prime 9 19 21 25?
19
Is 23 21 19 prime or composite?
19 and 23 are prime numbers whereas 21 is a composite number
Is 19 21 or 23 composite or prime?
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 are prime numbers out of 16 27 13 19 and 21?
They are 13 and 19
Which number is a prime number 7 16 21 28 93?
7 is prime.
What are prime numbers 16 27 13 19 21?
13,19.
What is the largest prime number less than 21?
19
Which is not a prime number 17 19 or 21?
21 isn't because 7*3=21.
What prime number comes after 19?
23 Prime numbers are odd numbers and 21=3x7
Is 10 19 21 62 composite numbers?
19 is prime number. 10, 21 and 62 are composite numbers.
Is the numbers 19 21 and 23 a composite number?
No, they are three numbers, not one. 21 is composite.
Is number 21 prime or composite?
number 21 is prime
Is the prime number 21 is a prime number?
21 is a composite number, not a prime, having prime factors 3x7.
What are the greatest common factor of 21 and 19?
If 1 is considered a factor, the only common factor of 21 & 19 is 1, because 19 is a prime number. I'm not sure whether 1 is considered a factor since it does not reduce the original number and it's not a prime number.
What is the next number in the series 13 18 16 21 19?
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
What are the factors and prime factors of 19 21 and 23?
1 and 19; 19 is prime. 1, 3, 7 and 21; 3 and 7 are prime. 1 and 23; 23 is prime.
Is 19 21 or 23 composite?
21 is composite. 19 and 23 are prime.
What is the prime factorization of 399 using only 21?
The prime factorization of 399 is 3 x 7 x 19. 21 wouldn't be included since it isn't a prime number.
The next number in the series 13 18 16 21 19 is?
24
What is the composite number between 20 and 50 whose prime factor have a sum of 21?
38 2-19= 21
What are prime number greater than 21?
There is an infinite number of prime numbers that are greater than 21. The next prime number after 21 is 23.
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