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A Prime number can only have adivisorof itself and 1.
Both 3 and 7 divide 21, so it cannot be a prime number.
I.e.: 21/3 = 7 and 21/7 = 3
A composite number has at least 1 divisor, and we already determined that both 3 and 7 are divisors, so:
21 is a composite number
21 is a composite number.
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∙ 9y ago
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Is 21 a prime composite or neither?
Composite
What prime numbers 21?
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. 21 is composite.
What is neither a prime nor a composite number?
It is 1 that is neither a prime or a composite number The number 1 is neither prime nor composite.
What is ONE composite or prime OR NEITHER?
ANSWER: One is neither prime nor composite.
Is 1 a prime a composite number or neither?
1 and 0 are neither composite or prime numbers
Is 21 a prime composite or neither?
Composite
Is the number 21 prime composite or neither?
3 * 7 = 21 21 is not prime
Is one composite or prime both prime and composite or neither prime or composite?
neither prime or composite
Is these prime or composite or neither 15 21 31 26 61?
31 and 61 are prime, the rest composite.
Is 21 a prime composite or neither number?
21 is a composite number because it has more than two factors
Is this number prime or composite 21?
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. 21 is composite.
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.
What are the factors of 21 is it composite or prime?
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.
What prime numbers 21?
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. 21 is composite.
What is neither a prime nor a composite number?
It is 1 that is neither a prime or a composite number The number 1 is neither prime nor composite.
What is ONE composite or prime OR NEITHER?
ANSWER: One is neither prime nor composite.
Is 1 a prime a composite number or neither?
1 and 0 are neither composite or prime numbers
