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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∙ 14y agoThe only composite factor of 21 is 21.
The number 357 is composite because it has factors other than 1 and itself.
21 is composite number because it has more than one number that goes into it
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Who says it is? 21 is a composite number!
21 and 28 are composite.
Some are, some are not.
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.
The only composite factor of 21 is 21.
21 is a composite number
seventeen 13 + 4 = 17 = 21 - 4
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.
The next composite number after 20 is 21.
21 is composite.
The number 357 is composite because it has factors other than 1 and itself.
21 is composite number because it has more than one number that goes into it
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