Greatest Common Factor and Least Common Multiple

Front

What is the Greatest Common Factor (GCF)?

Back

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

Front

How do you find the GCF of two numbers?

Back

List the factors of each number and identify the largest factor they have in common.

Front

What is the Least Common Multiple (LCM)?

Back

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

Front

How do you find the LCM of two numbers?

Back

List the multiples of each number and identify the smallest multiple they have in common.

Front

What is the GCF of 12 and 18?

Back

The GCF is 6.

Front

What is the LCM of 3 and 5?

Back

The LCM is 15.

Front

If Jenny goes to karate class every 12 days and the library every 18 days, when will she do both again?

Back

36 days later.

Front

What is the GCF of 10 and 21?

Back

The GCF is 1.

Front

What is the LCM of 4 and 14?

Back

The LCM is 28.

Front

Peter has 18 oranges and 27 pears. What is the greatest number of baskets he can make?

Back

He can make 9 baskets.