0
Which number is not a prime or a composite number 21 15 8 and 1?
Wiki User
∙ 7y ago
1 is not composite or prime.
Wiki User
∙ 7y ago
Wiki User
∙ 7y ago1 is not either.
Add your answer:
Earn +20 pts
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.
Why is 21 a prime number?
Who says it is? 21 is a composite number!
Is 21 and 31 a prime number?
21 is composite number that is a multiple of 3. 31 is a prime number.
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 these prime or composite or neither 15 21 31 26 61?
31 and 61 are prime, the rest composite.
Is 21 a prime number of composite?
21 is a composite number
Is number 21 prime or composite?
number 21 is prime
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.
Is the prime number 21 is a prime number?
21 is a composite number, not a prime, having prime factors 3x7.
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.
Why is 21 a prime number?
Who says it is? 21 is a composite number!
21 a prime or a compostie?
21 is a composite number.
Is 21 prime or compostie?
21 is a composite number.
Is the number 21 prime composite or neither?
3 * 7 = 21 21 is not prime
Is 21 and 31 a prime number?
21 is composite number that is a multiple of 3. 31 is a prime number.
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.
