Factors and Multiples

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number. For example, the factors of 12 are 1, 2, 3, 4, 6, and 12.

Front

What are multiples?

Back

Multiples are the result of multiplying a number by an integer. For example, the first four multiples of 3 are 3, 6, 9, and 12.

Front

What is a prime number?

Back

A prime number is a number that has only 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, and 8 are composite numbers.

Front

Is 1 a prime number?

Back

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

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two or more numbers is the smallest multiple that is exactly divisible by each of the numbers.

Front

What is the greatest common factor (GCF)?

Back

The greatest common factor (GCF) of two or more numbers is the largest factor that is common to all the numbers.

Front

List the first four multiples of 5.

Back

5, 10, 15, 20.

Front

Which of the following is a factor of 30: 2, 5, 7, 9?

Back

2 and 5 are factors of 30.

Front

What is the prime factorization of 12?

Back

The prime factorization of 12 is 2 x 2 x 3 or 2² x 3.