MathsYear 6Multiplication & Division

Common factors and common multiples

Identify common factors, common multiples and prime numbers; use common factors to simplify fractions

What you'll learn

  1. 1

    Imagine you have 12 stickers and your friend has 18 stickers. You want to share them into equal piles so both of you have the same number of piles.

  2. 2

    Here are the factors of 12: 1, 2, 3, 4, 6, 12. And the factors of 18: 1, 2, 3, 6, 9, 18.

  3. 3

    Which numbers are common factors of 12 and 18?

  4. 4

    Let's find the common multiples of 4 and 6 together.

  5. 5

    Find the common multiples of 6 and 9. Tap the numbers that appear in both lists.

  6. 6

    What is the smallest common multiple of 4 and 6? (Hint: it's the first number in both lists)

  7. 7

    Which of these is a common factor of 8 and 12?

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