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.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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

It looks like you have not completed the quiz.

To share your results with your teacher please complete the quiz.

Time to move!

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

For 5 mins...

Move around:
Jog

On the spot:
Dance

The next lesson in:
HCF and LCM
is:
Finding the LCM

Browse Oak's lessons: