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 18 are 1, 2, 3, 6, 9, and 18.

Front

What are multiples?

Back

Multiples are numbers that can be divided by a certain number without leaving a remainder. For example, the multiples of 7 are 7, 14, 21, 28, etc.

Front

What is a prime number?

Back

A prime number is a number greater than 1 that has no positive divisors other than 1 and itself. For example, 19 is a prime number.

Front

What is a composite number?

Back

A composite number is a number that has more than two positive divisors. For example, 36 is a composite number because it can be divided by 1, 2, 3, 4, 6, 9, 12, 18, and 36.

Front

List the factors of 18.

Back

The factors of 18 are 1, 2, 3, 6, 9, and 18.

Front

List the factors of 30.

Back

The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30.

Front

What are the first five multiples of 5?

Back

The first five multiples of 5 are 5, 10, 15, 20, and 25.

Front

What is the greatest common factor (GCF) of 18 and 30?

Back

The GCF of 18 and 30 is 6.

Front

What is the least common multiple (LCM) of 3 and 4?

Back

The LCM of 3 and 4 is 12.

Front

Identify a number that is both a factor and a multiple of 6.

Back

The number 12 is both a factor (of 12) and a multiple (of 6).