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Recognise Prime Numbers

In this worksheet, students will state whether or not a number is prime.

'Recognise Prime Numbers' worksheet

Key stage:  KS 2

Year:  Year 5 Maths worksheets

Curriculum topic:   Number: Multiplication and Division

Curriculum subtopic:   Know Prime Numbers

Popular topics:   Prime Numbers worksheets, Factors worksheets

Difficulty level:  

Worksheet Overview

 In this activity, we are going to be looking at the factors of numbers.


The number 6 has four factors, shown in pairs on the legs of this factor spider.

The factor pairs of 6 are:

1 and 6

2 and 3

So, it has two factor pairs and four factors: 1, 2, 3 and 6


Factor spider 6


The number 12 has six factors, shown on the legs of this factor spider.


Factor spider 12


The factor pairs of 12 are:
1 and 12
2 and 6
3 and 4


So there are three factor pairs and six factors: 1, 2, 3, 4, 6 and 12


Some factor spiders, such as the number 7, only have two legs.

These are the prime number factor spiders.


Factor spider 7


Prime numbers are very special.

They have only two factors: 1 and the number itself.


Let's have a go at some questions now.

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