Lowest common multiple and prime factors

In this lesson, we will use prime factorisation to identify common multiples and the lowest common multiple. We will also use Venn diagrams to sort prime factors.

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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.Find the lowest common multiple of 3 and 6

1/5

Q2.Find the highest common factors of 3 and 6

2/5

Q3.Find the LCM of 14 and 21

3/5

Q4.A pair of numbers have LCM OF 24. What could the pair of numbers be?

4/5

Q5.Zaki says that 2 prime numbers LCM is found by multiplying the prime numbers together, Is this true or false?

5/5

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:

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.Find the lowest common multiple of 3 and 6

1/5

Q2.Find the highest common factors of 3 and 6

2/5

Q3.Find the LCM of 14 and 21

3/5

Q4.A pair of numbers have LCM OF 24. What could the pair of numbers be?

4/5

Q5.Zaki says that 2 prime numbers LCM is found by multiplying the prime numbers together, Is this true or false?

5/5

Video

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Worksheet

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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:

LCM and prime factors quiz

Show what you've learnt!

Q1.Fill in the gaps, in the correct order: Writing numbers as a __________ of their _______ factors helps you to find the lowest common multiple.

1/5

Q2.The Venn diagram shows the prime factors of 60 and 84. Write 60 as a product of its prime factors.

2/5

Q3.The Venn diagram shows the prime factors of 60 and 84. Write 84 as a product of its prime factors.

3/5

Q4.The Venn diagram shows the prime factors of 60 and 84. Which calculation represents the LCM of 60 and 84?

4/5

Q5.The Venn diagram shows the prime factors of 60 and 84. What is the LCM of 60 and 84?

5/5

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:

LCM and prime factors quiz

Show what you've learnt!

Q1.Fill in the gaps, in the correct order: Writing numbers as a __________ of their _______ factors helps you to find the lowest common multiple.

1/5

Q2.The Venn diagram shows the prime factors of 60 and 84. Write 60 as a product of its prime factors.

2/5

Q3.The Venn diagram shows the prime factors of 60 and 84. Write 84 as a product of its prime factors.

3/5

Q4.The Venn diagram shows the prime factors of 60 and 84. Which calculation represents the LCM of 60 and 84?

4/5

Q5.The Venn diagram shows the prime factors of 60 and 84. What is the LCM of 60 and 84?

5/5

Lesson summary: Lowest common multiple and prime factors

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This was the final lesson in the unit Prime factor decomposition.

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