# Find the Highest Common Factor of Two Numbers

In this worksheet, students will find the highest common factor of two numbers.

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Concepts and Vocabulary for All Numbers

Popular topics:   Factors worksheets

Difficulty level:

#### Worksheet Overview

The factors of 42 are 12, 3, 6, 714, 21 and 42.

The factors of 28 are 1, 2, 4, 7, 14 and 28.

Some of these factors appear in both lists and these are the common factors of 42 and 28.

They are:

1, 2, 7 and 14

But 14 is the greatest or the highest common factor (HCF) of 42 and 28

Let's have a go at some questions and see if we can spot the HCF of numbers.

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