Prime and Composite Numbers

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What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

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CCSS.4.OA.B.4

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What is a composite number?

Back

A composite number is a natural number greater than 1 that is not prime, meaning it has more than two positive divisors.

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CCSS.4.OA.B.4

Front

Is the number 1 a prime number?

Back

No, the number 1 is not considered a prime number.

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CCSS.4.OA.B.4

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Is the number 0 a composite number?

Back

No, the number 0 is neither prime nor composite.

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CCSS.4.OA.B.4

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List the first five prime numbers.

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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 prime number?

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The smallest prime number is 2.

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CCSS.4.OA.B.4

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What is the largest two-digit prime number?

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The largest two-digit prime number is 97.

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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 by testing divisibility with prime numbers up to its square root.

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CCSS.4.OA.B.4

Front

What is the difference between prime and composite numbers?

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Prime numbers have exactly two distinct positive divisors (1 and itself), while composite numbers have more than two positive divisors.

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CCSS.4.OA.B.4

Front

Is the number 4 prime or composite?

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The number 4 is a composite number.

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CCSS.4.OA.B.4