# Simple LCM and HCF

In this lesson, we will learn about the terms 'Lowest Common Multiple' and 'Highest Common Factor'. We will learn how to determine lowest common multiples for small integers by listing and comparing their factors and multiples.

# 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:

# Simple LCM and HCF

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

Q1.18 is a multiple of 6?

1/4

Q2.Find the HCF and the LCM of 6 and 15.

2/4

Q3.You can find the LCM of any 2 numbers by multiplying them together!

3/4

Q4.A green light flashes every 15 minutes and a red light flashes every 50 minutes. If they start to flash at the same time, after how long will they both flash together?

4/4

Quiz:

# Simple LCM and HCF

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

Q1.18 is a multiple of 6?

1/4

Q2.Find the HCF and the LCM of 6 and 15.

2/4

Q3.You can find the LCM of any 2 numbers by multiplying them together!

3/4

Q4.A green light flashes every 15 minutes and a red light flashes every 50 minutes. If they start to flash at the same time, after how long will they both flash together?

4/4

# Lesson summary: Simple LCM and HCF

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance