LCM and GCF

Front

What is the Least Common Multiple (LCM)?

Back

The 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 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 LCM of two numbers?

Back

To find the LCM, list the multiples of each number and identify the smallest multiple that appears in both lists.

Front

How do you find the GCF of two numbers?

Back

To find the GCF, list the factors of each number and identify the largest factor that appears in both lists.

Front

What are the factors of 12?

Back

1, 2, 3, 4, 6, 12

Front

What are the factors of 25?

Back

1, 5, 25

Front

What is the LCM of 5 and 20?

Back

20

Front

What is the GCF of 16 and 24?

Back

8

Front

If Avery gets newsletters every 5, 10, and 8 days, how do you find when he gets them all together again?

Back

Find the LCM of 5, 10, and 8, which is 40 days.

Front

What is an example of finding the LCM using prime factorization?

Back

For 12 (2^2 * 3) and 18 (2 * 3^2), the LCM is 36 (2^2 * 3^2).