Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Is it a Prime Number or Composite? (2)

In this worksheet, students decide whether or not a given number is prime or composite.

This content is premium and exclusive to EdPlace subscribers.

'Is it a Prime Number or Composite? (2)' worksheet

Key stage:  KS 2

Year:  Year 4 11+ worksheets

Curriculum topic:   Maths and Numerical Reasoning

Curriculum subtopic:   Factors and Multiples

Difficulty level:  

Worksheet Overview

A PRIME number is one that only has two factors, itself and 1.

A COMPOSITE number is one that has more than two factors.

 

PRIME numbers include 2, 3, 5, 7, 11, 13, 17 etc....

COMPOSITE numbers include 4, 6, 8, 9, 10, 12, 14, 15 etc....

 

 

Example 1

Is the following number prime or composite?

13

 

Answer

13 = 13 × 1

No other whole numbers multiply together to make 13.

 

The numbers that go into 13 exactly are called its factors.

13 only has the two factors of 13 and 1 and so it is prime.

 

 

Example 2

Is the following number prime or composite?

12

 

Answer

12 = 12 × 1

12 = 6 × 2

12 = 4 × 3

 

The numbers that go into 12 exactly are called its factors.

12 has factors of 12, 6, 4, 3, 2 and 1 and so it is composite.

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