Cube roots for 11+ maths: a clear guide for parents
21 October 2026
What is a cube root
A cube root is the number that, when multiplied by itself three times, gives the original number.
Cube roots are a key part of the 11+ maths syllabus and often appear in reasoning and calculation questions.
Key insight: Knowing cube roots helps children spot patterns and solve problems more confidently in the 11+ exam.
Why cube roots matter for 11+
Understanding cube roots builds number sense and strengthens your child's ability to work with powers and roots.
Cube roots also appear in questions about 3D shapes, volume, and number puzzles.
Worked example
Step 1: The cube root of a number is the number that, when multiplied by itself three times, gives that number.
Step 2: Let's use 27 as our example.
Step 3: 3 × 3 = 9
Step 4: 9 × 3 = 27
The correct answer is 3. The cube root of 27 is 3.
How to practise cube roots
Start by learning the most common cube numbers: 1, 8, 27, 64, 125, 216, 343, 512, 729, and 1000.
Encourage your child to practise finding cube roots for these numbers until they feel confident.
Building confidence with practice
Regular practice with cube roots helps children recognise patterns and answer questions quickly.
Key insight: Practising cube roots alongside squares and square roots gives your child a solid foundation for 11+ maths.
Where to find practice resources
EEZY BREEZY MATHS offers targeted practice packages for cube roots, designed for 11+ preparation.
These resources help children learn independently and track their progress, making revision easier for families.
