NumberKS3 / GCSE

Lowest common multiple by listing

Find the first positive multiple shared by two numbers.

  • List positive multiples of each number.
  • Extend the shorter list until a common multiple appears.
  • Choose the smallest positive common multiple.

Example 1

Find the lowest common multiple.

The answer is the first positive number that appears in both lists.

Example 2

Find the lowest common multiple.

The answer is the first positive number that appears in both lists.

Remember
Choose the smallest positive common multiple.

Your turn

Question 1

Find the lowest common multiple.

Check answer

The answer is the first positive number that appears in both lists.

Question 2

Find the lowest common multiple.

Check answer

The answer is the first positive number that appears in both lists.

Question 3

Find the lowest common multiple.

Check answer

The answer is the first positive number that appears in both lists.

Question 4

Find the lowest common multiple.

Check answer

The answer is the first positive number that appears in both lists.

Question 5

Find the lowest common multiple.

Check answer

The answer is the first positive number that appears in both lists.

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