Year 10
Foundation
Year 10
Foundation

Prime Factor Decomposition

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Lesson details

Key learning points

  1. In this lesson, we will revisit the concept of using factor trees to rewrite a number as a product of its prime factors.

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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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5 Questions

Q1.
True or False, three of these numbers are prime and more than 20.
An image in a quiz
Correct answer: False
True
Q2.
Which number lies in the intersection (middle) of this Venn diagram?
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10
Correct answer: 2
2 and 2
6
Q3.
How many of the factors of 39 are prime numbers?
1
Correct answer: 2
3
4
Q4.
Which two prime numbers sum to 40?
Correct answer: 17 and 23
2 and 38
29 and 21
7 and 33
Q5.
The product of which two prime numbers find another prime number?
13 and 11
2 and 3
2 and 7
Correct answer: None of these

4 Questions

Q1.
Q1) Write 4 x 14 as a product of prime factors.
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A
B
Correct answer: C
D
Q2.
Which number is missing from this diagram?
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2
Correct answer: 3
4
9
Q3.
Write 300 as the product of prime factors in index form.
An image in a quiz
A
B
C
Correct answer: D
Q4.
Find the missing number/s.
An image in a quiz
2
2 and 3
Correct answer: 3
4