# Prime Factor Decomposition

A recap lesson about using factor trees to find the product of prime numbers of an integer.

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!

## Question 5

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

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!

## Question 5

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.

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.

## Question 4

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

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.

## Question 4

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!

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For 5 mins...

Move around:
Walk

On the spot:
Dance

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