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Q: How can knowing whether a number is prime or composite help as you work in math?

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Now.... That depends on whether it is a number orr not!? :)

20 is a composite number

A number can be factored to determine whether it is prime or composite. A prime number has exactly 2 factors, 1 and the number itself. A composite number has more than two factors.

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

Prime numbers have only two factors. Composite numbers have more than two.

You cannot. If a number is even - other than 2 - then it is a composite number. However, if it is odd, it is not easily possible to tell whether it is prime or composite.

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

The answer depends on whether or not the prime number is a factor of the other number.If the prime number is a factor of the other number then the GCF is the prime, otherwise the GCF is 1.

It is not a prime number, it is a composite number.

It is a composite number.

It is not a prime number, it is a composite number.

It is a composite number, not a prime number.

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