Respuesta :

21 because 7 and 3 along with 1 and 21 can be multiplied

Answer:

21

Step-by-step explanation:

a composite number can be formed when having more that just 2 factors

Ex: 21

1 times 21

3 times 7

But the other number is prime it only has 2 factors 1 and the number by it self

Hope this helps

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