Identifying Prime and Composite Numbers

Front

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

Front

What is a composite number?

Back

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

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CCSS.4.OA.B.4

Front

Is the number 1 a prime number, composite number, or neither?

Back

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

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CCSS.4.OA.B.4

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

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CCSS.4.OA.B.4

Front

Is the number 2 a prime number?

Back

Yes, the number 2 is a prime number.

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CCSS.4.OA.B.4

Front

What is the largest two-digit prime number?

Back

The largest two-digit prime number is 97.

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CCSS.4.OA.B.4

Front

Can a prime number be even?

Back

Yes, the only even prime number is 2.

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CCSS.4.OA.B.4

Front

What is the difference between prime and composite numbers?

Back

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

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CCSS.4.OA.B.4

Front

List three examples of composite numbers.

Back

Examples of composite numbers include 4, 6, and 8.

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CCSS.4.OA.B.4

Front

What is the prime factorization of 40?

Back

The prime factorization of 40 is 2^3 × 5.