# Prime Factor Decomposition

In this lesson, we will revisit the concept of using factor trees to rewrite a number as a product of its prime factors.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.True or False, three of these numbers are prime and more than 20.

1/5

Q2.Which number lies in the intersection (middle) of this Venn diagram?

2/5

Q3.How many of the factors of 39 are prime numbers?

3/5

Q4.Which two prime numbers sum to 40?

4/5

Q5.The product of which two prime numbers find another prime number?

5/5

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.True or False, three of these numbers are prime and more than 20.

1/5

Q2.Which number lies in the intersection (middle) of this Venn diagram?

2/5

Q3.How many of the factors of 39 are prime numbers?

3/5

Q4.Which two prime numbers sum to 40?

4/5

Q5.The product of which two prime numbers find another prime number?

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Prime Factor Decomposition

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Q1) Write 4 x 14 as a product of prime factors.

1/4

Q2.Which number is missing from this diagram?

2/4

Q3.Write 300 as the product of prime factors in index form.

3/4

Q4.Find the missing number/s.

4/4

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Prime Factor Decomposition

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Q1) Write 4 x 14 as a product of prime factors.

1/4

Q2.Which number is missing from this diagram?

2/4

Q3.Write 300 as the product of prime factors in index form.

3/4

Q4.Find the missing number/s.

4/4

# Lesson summary: Prime Factor Decomposition

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga