Factors, Prime and Composite Numbers

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What is a composite number?

Back

A composite number is a natural number greater than 1 that has more than two distinct positive divisors (factors).

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CCSS.4.OA.B.4

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What is a prime number?

Back

A prime number is a natural number greater than 1 that has exactly two distinct positive divisors: 1 and itself.

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CCSS.4.OA.B.4

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Is the number 1 a prime number or a composite number?

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The number 1 is neither a prime nor a composite number.

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CCSS.4.OA.B.4

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What are the first five prime numbers?

Back

The first five prime numbers are 2, 3, 5, 7, and 11.

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CCSS.4.OA.B.4

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What is the smallest composite number?

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The smallest composite number is 4.

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CCSS.4.OA.B.4

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How can you determine if a number is prime?

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To determine if a number is prime, check if it has any divisors other than 1 and itself. If it does, it is composite.

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CCSS.4.OA.B.4

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What is the relationship between prime and composite numbers?

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Prime numbers are numbers with exactly two factors, while composite numbers have more than two factors.

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CCSS.4.OA.B.4

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Is the number 33 prime or composite?

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The number 33 is a composite number.

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CCSS.4.OA.B.4

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What is a factor?

Back

A factor is a whole number that can be divided evenly into another number.

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CCSS.4.OA.B.4

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Can a prime number be even?

Back

Yes, the only even prime number is 2; all other even numbers are composite.

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CCSS.4.OA.B.4