Factors, Prime and Composite Numbers

Front

What is a prime number?

Back

A prime number is a number greater than 1 that has exactly two factors: 1 and itself. For example, 2, 3, 5, and 7 are prime numbers.

Front

What is a composite number?

Back

A composite number is a number that has more than two factors. For example, 4, 6, 8, and 9 are composite numbers.

Front

What are factors?

Back

Factors are the numbers you multiply together to get another number. For example, the factors of 12 are 1, 2, 3, 4, 6, and 12.

Front

Which of these numbers is a prime number: 15, 17, 21, 39?

Back

17 is a prime number.

Front

Which of these numbers is a prime number: 10, 9, 7, 4?

Back

7 is a prime number.

Front

How many factors does a prime number have?

Back

A prime number has exactly 2 factors.

Front

How many factors does a composite number have?

Back

A composite number has more than 2 factors.

Front

Is the number 1 a prime number?

Back

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

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the largest single-digit prime number?

Back

The largest single-digit prime number is 7.