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Q: How do you know 28 is composite number?

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28 is a composite number because it has factors of 2 and 7.

21 and 28 are composite.

No, 28 is a Composite Number.

composite and 2*2*7 = 28

The composite factors of 28 are 4, 14, 28 The composite factors of 24 are 4, 6, 8, 12, 24

28 is a composite number because it has more than two factors but 29 is a prime number because it has only two factors.

1,2,4,7,14,28

30

28 is a composite number because it can be divided by more numbers than it's self and one.

28 is a composite number because it has 6 factors: 1, 2, 4, 7, 14, and 28.

Not all numbers between 20 and 28 are composite numbers. 23 is a prime number.

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