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21 is a composite number, as it can be divided by 7 and 3. The other three numbers are prime numbers and do not divide into anything besides themselves.
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What is the composite number for 21?
The only composite factor of 21 is 21.
Is 357 prime or composite?
The number 357 is composite because it has factors other than 1 and itself.
Why is 21 a composite number?
21 is composite number because it has more than one number that goes into it
What is the smallest prime number where each of the digits is a prime number 23 13 21 17?
13
Why is 21 a prime number?
Who says it is? 21 is a composite number!
What are the composite number by 28 21 17?
21 and 28 are composite.
Are 4 11 13 17 21 22 23 composite?
Some are, some are not.
What is the composite number for 21?
The only composite factor of 21 is 21.
Which number is prime out of 91 51 31 21?
21 is divisible by 3 and 7, so it is composite. 91 is divisible by 7 and 13, so it is composite. 51 is divisible by 3 and 17. 31 is divisible by only 1 and itself, so it is the prime number.
Is 21 a prime number of composite?
21 is a composite number
What number is halfway between 13 and 21?
seventeen 13 + 4 = 17 = 21 - 4
What is the next composite number after 20?
The next composite number after 20 is 21.
What is the composite of 21?
A composite number is a number that has more than two factors. The factors of 21 are 1, 3, 7, and 21. Therefore, 21 is a composite number.
Which is a composite number 19 21 23?
21 is composite.
Is 357 prime or composite?
The number 357 is composite because it has factors other than 1 and itself.
Why is 21 a composite number?
21 is composite number because it has more than one number that goes into it
What is the first composite number after 21?
The first composite number greater than 21 is 22.
