Identify the composite number from the list.

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Multiple Choice

Identify the composite number from the list.

Explanation:
Composite numbers are integers greater than 1 that can be written as a product of two integers both larger than 1, so they have more than two positive divisors. In the list, 7 has only 1 and 7 as divisors, so it’s prime. 9 can be written as 3×3, giving divisors 1, 3, and 9, so it’s composite. 11 and 13 are prime as well. Therefore, the composite number is 9.

Composite numbers are integers greater than 1 that can be written as a product of two integers both larger than 1, so they have more than two positive divisors. In the list, 7 has only 1 and 7 as divisors, so it’s prime. 9 can be written as 3×3, giving divisors 1, 3, and 9, so it’s composite. 11 and 13 are prime as well. Therefore, the composite number is 9.

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