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no because 7 times 3 and 1 and21
Wiki User
∙ 14y ago
No, 21 is not a Prime number. It can be divided evenly by numbers other than 1 and itself, such as 3 and 7.
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Is 21a prime or composite number?
Composite 1x21and 7x3
Is 21a prime number or a composite?
21 is a composite number because it has more than two factors
Is 4a2-21a plus 5 prime?
No.
Can you trace a serial number for a Model 21A Beretta?
Contact your local police.
Is 21a composite number?
Yes 21 is a composite number because it has more than two factors
How do you simplify 17a plus 21a plus 45?
17a + 21a + 45 = 38a+ 45
What is the difference between beretta 21a and 21a bobcat?
The "Bobcat" name was before the numerical assignment. They are one in the same gun.
What is you called when the prime factorization of a number is 1 and itself?
You is called a prime number!You is called a prime number!You is called a prime number!You is called a prime number!
Is a factor a prime number?
A factor can or cannot be a prime number Ex: 2 is the factor of all other even numbers its a prime number but 9 is a factor of 18 and its not a prime number A prime is a factor but a factor being a prime number varies
Why 7 is not a prime number?
7 is a prime number!
What is it called when a number can only be divided by one and itself?
a prime number.
What is a prime number times a prime number?
A prime number times a prime number is a composite number. Since prime numbers, except for 2, are odd numbers, a prime number times a prime number is usually an odd number. It will only be an even number if one of the prime numbers is 2. A prime number times a prime number will be a number with four factors unless both prime numbers are the same, in which case it will be a square number with only three factors.
