Q: What two composite numbers have factors that add up to 18?

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Prime numbers have two factors, composite numbers have more than two.

65 and 77, among others.

All composite numbers have more than two factors whereas prime numbers have only two factors

522 is composite. Composite numbers have over two factors and prime numbers have only two factors which is one and the number itself.

Prime numbers have two factors; composite numbers have more than two.

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Prime numbers are numbers with only two factors. Composite numbers are numbers with more than two factors.

Composite numbers have more than two factors whereas prime numbers have only two factors.

Prime numbers have only two factors which are themselves and one and they add up in the same way as composite numbers which have more than two factors

Composite numbers have more than two factors. So, the numbers which have two or less than two factors are not composite numbers. Numbers which have exactly two factors are prime numbers. 1 is an exceptional case because it is neither prime nor composite since it has only one factor which is 1.

Composite numbers have more than two factors whereas prime numbers have only two factors.

Prime numbers have two factors, composite numbers have more than two.

65 and 77, among others.

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

Prime numbers have two factors, composite numbers have more than two.

Composite numbers have more than two factors.

Composite numbers are numbers that have more than two factors.

All composite numbers have more than two factors whereas prime numbers have only two factors