GCF and LCM

Front

What is the definition of GCF (Greatest Common Factor)?

Back

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

Front

What is the definition of LCM (Least Common Multiple)?

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 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 a composite number?

Back

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

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.

Front

What is the prime factorization of 30?

Back

The prime factorization of 30 is 2 x 3 x 5.

Front

What is the prime factorization of 48?

Back

The prime factorization of 48 is 2 x 2 x 2 x 2 x 3.

Front

Find the GCF of 18 and 24.

Back

The GCF of 18 and 24 is 6.

Front

Find the LCM of 4 and 5.

Back

The LCM of 4 and 5 is 20.