GCF and LCM

Front

What is the greatest common factor (GCF)?

Back

The GCF of two or more numbers is the largest number that divides all of them without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

1. List the factors of each number. 2. Identify the common factors. 3. The largest of these common factors is the GCF.

Front

What is the least common multiple (LCM)?

Back

The LCM of two or more numbers is the smallest number that is a multiple of all of them.

Front

How do you find the LCM of two numbers?

Back

1. List the multiples of each number. 2. Identify the common multiples. 3. The smallest of these common multiples is the LCM.

Front

Find the GCF of 28 and 42.

Back

The GCF is 14.

Front

Find the LCM of 3 and 5.

Back

The LCM is 15.

Front

What is a composite number?

Back

A composite number is a positive integer that has at least one positive divisor other than one or itself.

Front

Identify a composite number from the following: 2, 3, 4, 5.

Back

4 is a composite number.

Front

What is the GCF of 60 and 48?

Back

The GCF is 12.

Front

What is the LCM of 4 and 6?

Back

The LCM is 12.