Primes and Composites

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has exactly two factors: 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 factors.

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CCSS.4.OA.B.4

Front

Is the number 1 a prime number?

Back

No, 1 is not a prime number because it has only one factor.

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CCSS.4.OA.B.4

Front

What is the only even prime number?

Back

The only even prime number is 2.

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CCSS.4.OA.B.4

Front

Can prime numbers 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

Front

List the first five prime numbers.

Back

2, 3, 5, 7, 11.

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CCSS.4.OA.B.4

Front

What is the smallest composite number?

Back

The smallest composite number is 4.

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CCSS.4.OA.B.4

Front

Are all prime numbers odd?

Back

No, the only even prime number is 2; all other prime numbers are odd.

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CCSS.4.OA.B.4

Front

What is a factor?

Back

A factor is a number that divides another number without leaving a remainder.

Tags

CCSS.4.OA.B.4

Front

How many factors does a prime number have?

Back

A prime number has exactly two factors.

Tags

CCSS.4.OA.B.4