Lesson details

Key learning points

  1. In this lesson, we will revisit factors and learn about highest common factors.

Licence

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5 Questions

Q1.
75 = 15 x .....
15
25
3
Correct answer: 5
Q2.
168 = ..... x 21
14
42
6
Correct answer: 8
Q3.
Which of these is not a factor of 42?
14
21
Correct answer: 4
6
Q4.
One of the factors of 168 is a square number.
False
Correct answer: True
Q5.
Which two numbers will multiply to make a square number?
245 and 30
30 and 42
Correct answer: 42 and 168
72 and 245

6 Questions

Q1.
Which of these is not a factor of 27?
1
27
Correct answer: 7
9
Q2.
Which is not a factor of 54?
27
Correct answer: 4
6
9
Q3.
Which is a common factor of 28 and 36?
12
Correct answer: 4
6
7
Q4.
What is the highest common factor of 6 and 9?
1
Correct answer: 3
54
6
Q5.
What is the HCF of 30 and 42?
12
4
Correct answer: 6
Q6.
True or False? If the HCF is 12, then 4 and 3 are common factors.
False
Correct answer: True

Lesson appears in

UnitMaths / Prime factor decomposition