LCM and 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 each of the numbers.

Front

How do you find the LCM of two numbers?

Back

To find the LCM, list the multiples of each number and find the smallest multiple they have in common.

Front

What is the Greatest Common Factor (GCF)?

Back

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

Front

How do you find the GCF of two numbers?

Back

To find the GCF, list the factors of each number and find the largest factor they have in common.

Front

What is the LCM of 15 and 20?

Back

The LCM of 15 and 20 is 60.

Front

What is the GCF of 12 and 18?

Back

The GCF of 12 and 18 is 6.

Front

If two clocks chime every 15 minutes and 25 minutes, when will they chime together?

Back

They will chime together in 75 minutes.

Front

What is the LCM of 5 and 10?

Back

The LCM of 5 and 10 is 10.

Front

What is the GCF of 8 and 32?

Back

The GCF of 8 and 32 is 8.

Front

What is the LCM of 3 and 7?

Back

The LCM of 3 and 7 is 21.