Year 10
Foundation

Year 10
Foundation

# Prime Factor Decomposition

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Slide decks, worksheets, quizzes and lesson planning guidance designed for your classroom.

## 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.

### Licence

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## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
True or False, three of these numbers are prime and more than 20.
True
Q2.
Which number lies in the intersection (middle) of this Venn diagram?
10
2 and 2
6
Q3.
How many of the factors of 39 are prime numbers?
1
3
4
Q4.
Which two prime numbers sum to 40?
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

## Exit quiz

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### 4 Questions

Q1.
Q1) Write 4 x 14 as a product of prime factors.
A
B
D
Q2.
Which number is missing from this diagram?
2
4
9
Q3.
Write 300 as the product of prime factors in index form.
A
B
C