# Prime numbers

In this lesson, we will explore numbers with only two factors and define these as prime numbers. We will then play a game that involves making arrays and identifying prime numbers up to 20. Our independent task to conclude the lesson will require all prime numbers up to 100 to be identified by using a range of clues based on multiples and 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.Which of the following pairs are NOT factor pairs for the number 48?

1/5

Q2.During the lesson, we grouped 20 children into equal sized groups. How many different ways of did we find of grouping them equally?

2/5

Q3.Lisa began to create her factor bug for the number 24 but was unable to complete it before the end of the lesson. How many factor pairs is she missing?

3/5

Q4.In the image below, you can see the first 3 squared numbers. What would the 6th squared number be in the sequence?

4/5

Q5.Which of the following is not a squared 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.Which of the following pairs are NOT factor pairs for the number 48?

1/5

Q2.During the lesson, we grouped 20 children into equal sized groups. How many different ways of did we find of grouping them equally?

2/5

Q3.Lisa began to create her factor bug for the number 24 but was unable to complete it before the end of the lesson. How many factor pairs is she missing?

3/5

Q4.In the image below, you can see the first 3 squared numbers. What would the 6th squared number be in the sequence?

4/5

Q5.Which of the following is not a squared 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 Numbers Quiz

You certainly gave a PRIME example of your mathematical skills today! Well done on identifying so many prime numbers. Now it is time to demonstrate all the knowledge you acquired from today's lesson. You might find the factor slugs help you remember the key facts to remember when using prime numbers!

Q1.1 is not a prime number because...

1/5

Q2.Which of the following statements is TRUE?

2/5

Q3.Which of the following numbers is NOT a prime number?

3/5

Q4.Which of the following numbers IS a prime number?

4/5

Q5.Read the statements below. Can you identify which one is TRUE?

5/5

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

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

# Prime Numbers Quiz

You certainly gave a PRIME example of your mathematical skills today! Well done on identifying so many prime numbers. Now it is time to demonstrate all the knowledge you acquired from today's lesson. You might find the factor slugs help you remember the key facts to remember when using prime numbers!

Q1.1 is not a prime number because...

1/5

Q2.Which of the following statements is TRUE?

2/5

Q3.Which of the following numbers is NOT a prime number?

3/5

Q4.Which of the following numbers IS a prime number?

4/5

Q5.Read the statements below. Can you identify which one is TRUE?

5/5

# Lesson summary: Prime numbers

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga