Prime Factors, GCF, and LCM Flashcard

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Tags

CCSS.4.OA.B.4

Front

What are prime factors?

Back

Prime factors are the prime numbers that multiply together to give a certain original number.

Front

How do you find the GCF (Greatest Common Factor) 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 is the GCF of 18 and 24?

Back

6

Front

What is the GCF of 32 and 48?

Back

16

Front

What is the LCM (Least Common Multiple)?

Back

The LCM is the smallest multiple that is exactly divisible by two or more numbers.

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

What are the prime factors of 100?

Back

2, 5

Front

What are the prime factors of 45?

Back

3, 5

Front

Which of the following is not a prime number: 11, 13, 16, 19?

Back

16

Tags

CCSS.4.OA.B.4