# Highest Common Factors (2)

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

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Key stage:  KS 2

Curriculum topic:   Maths and Numerical Reasoning

Curriculum subtopic:   Factors and Multiples

Difficulty level:

#### Worksheet Overview

The factors of 42 are 1, 2, 3, 6, 7, 14, 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.

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