Year 10
Foundation
Finding the HCF
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Lesson details
Key learning points
- In this lesson, we will find the 'Highest Common Factor' of two integers by comparing their prime factors using a Venn diagram.
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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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4 Questions
Q1.
B
C
D
Q2.
The Venn diagram shows the product of primes for numbers A and B. What is the value of B?
A
B
C
Q3.
The Venn diagram shows the product of primes for numbers A and B. What is the LCM of these two numbers?
B
C
D
Q4.
Find the LCM of 38 and 42.
1596
352
523
4 Questions
Q1.
Find 28 as the product of its prime factors.
A
B
C
Q2.
True or False, Number A and B are 28 and 42?
False
Q3.
What is the HCF of 28 and 42?
B
C
D
Q4.
What is the HCF of 48 and 72?
12
14
32
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