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Finding the Product of Prime Factors

In this worksheet, students practise finding the product of prime factors.

'Finding the Product of Prime Factors' worksheet

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Concepts and Vocabulary for All Numbers

Difficulty level:  

Worksheet Overview

In this worksheet, you must write numbers as the products of prime factors.


Method

All whole numbers, other than primes and the number 1, can be written as the product of their prime factors.


We find the prime factors of a number by successively dividing the number by prime numbers. 


Example

Write 1800 as the product of its prime factors.
 

Look at this division.

 

Here we pick out the red numbers to show that

1800 = 23 × 32 × 52

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