🔢 Number

Common multiples

Learn common multiples with a GCSE-style explanation, help guide, worked example, practice question and flashcards.

NumberKS325 XP completion3 flashcards

Global XP

Level 1

0 / 100 XP

1. Explanation

Key idea

Common multiples is part of number and appears often in KS3–GCSE maths.
Common multiples are multiples shared by two or more numbers.
Use the worked model, help guide, interactive question and flashcards to practise common multiples until the steps feel automatic.

Shopping, sport, travel, science, design and everyday decisions all use this skill.

2. Visual

Understand the key idea → follow the help guide → practise a question → check your method → build speed with flashcards.

3. Help guide

Learn the rule: Common multiples are multiples shared by two or more numbers.
Worked model: List multiples of each number. Find values that appear in both lists. Choose the lowest if asked for the LCM.
Try the interactive question without looking at the answer first.
Use the flashcards to test the rule, the method and a common check.

4. Worked examples

Answer: LCM of 3 and 5 is 15

5. Interactive questions

6. Flashcards

Flip each card, then choose whether you know it or need more practice.

0 mastered

FrontRule for Common multiples

BackCommon multiples are multiples shared by two or more numbers.

FrontExample answer: What is the lowest common multiple of 4 and 6?

BackMultiples of 4 are 4, 8, 12. Multiples of 6 are 6, 12. The lowest common multiple is 12.

FrontCommon check for Common multiples

BackCheck units/notation, compare with an estimate, and make sure the answer matches the question.

7. Finish

When you have read the examples, tried the question and reviewed flashcards, claim your topic completion XP.