GCF and LCM

Front

What does GCF stand for?

Back

GCF stands for Greatest Common Factor, which is the largest number that divides two or more numbers without leaving a remainder.

Front

What does LCM stand for?

Back

LCM stands for Least Common Multiple, which is the smallest number that is a multiple of two or more numbers.

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 they have in common.

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 they have in common.

Front

What is the GCF of 16 and 24?

Back

The GCF of 16 and 24 is 8.

Front

What is the LCM of 4 and 5?

Back

The LCM of 4 and 5 is 20.

Front

Is 1 a prime number?

Back

No, 1 is not a prime number because it has only one factor.

Front

Is 2 a prime number?

Back

Yes, 2 is a prime number because it has exactly two distinct positive factors: 1 and 2.

Front

What is the GCF of 14 and 20?

Back

The GCF of 14 and 20 is 2.

Front

What is the LCM of 15 and 20?

Back

The LCM of 15 and 20 is 60.