Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Know Your Prime Numbers

In this worksheet, students will identify all the prime numbers between two given numbers.

Worksheet Overview

In this activity, we will be testing our knowledge of prime numbers in order to list all the prime numbers between two numbers.

 

Remember that a prime number is only divisible by itself and 1. It has exactly two factors.

 

girl thinking

 

Example
Write down all the prime numbers between 10 and 30.

 

Answer 

Prime numbers have only two factors - the number 1 and the number itself.

 

We can immediately remove all the even numbers as possible prime numbers because they all have the number 2 as a factor.

So we can remove 12, 14, 16, 18, 20, 22, 24, 26 and 28.

That leaves us with 11, 13, 15, 17, 19, 21, 23, 25, 27 and 29 as possible contenders.

 

15 is not a prime number because it has 3 and 5 as its factors: 3 x 5 = 15

21 is not a prime number because it has 3 and 7 as its factors: 3 x 7 = 21

25 is not a prime number because it has 5 as a factor: 5 x 5 = 25

27 is not a prime number because it has 3 and 9 as its factors: 3 x 9 = 27


That leaves us with: 11, 13, 17, 19, 23 and 29 as the prime numbers between 10 and 30. 

All of those numbers have only two factors.

 

girl thinking

 

Let's have a go at some questions now.

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started
laptop

Try an activity or get started for free

  • National Tutoring Awards 2023 Shortlisted / Parents
    National Tutoring Awards 2023 Shortlisted
  • Private-Tutoring-WINNER-EducationInvestor-Awards / Parents
    Winner - Private Tutoring
  • Bett Awards Finalist / Parents
    Finalist
  • Winner - Best for Home Learning / Parents
    Winner - Best for Home Learning / Parents