Understanding cube numbers as a number multiplied by itself three times (e.g., 3³ = 27), recognising cubes up to 5³ = 125.
Where your child meets this in real life: Calculating volumes of cubes, understanding 3D scaling
Each SEAG paper has 28 maths questions. Questions 29 to 50 are multiple choice with five possible answers, and questions 51 to 56 need a short written answer. With 56 questions in 60 minutes across English and maths, that is about a minute per question.
SEAGReady breaks cube numbers into 2 steps, taught in order so each skill builds on the last.
Calculate cube numbers from 1³ to 5³ by multiplying a number by itself three times
Identify cube numbers and find which number was cubed to produce a given cube number
Try three free questions from our cube numbers course. They start easy and get harder, so you can see where your child's confidence runs out. If they manage the last one without a hint, this topic is probably secure. If not, the steps above show where to start.
Jake is building a cube out of toy bricks. Each edge of his cube is 3 bricks long. How many toy bricks does he need altogether?
Which of these is a cube number?
Ella has 27 small cubes. She builds them into a larger cube. Then she paints the outside of the larger cube red. How many of the small cubes have NO red paint on them?
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Katie is building a cube out of small wooden blocks. Each edge of her cube is 4 blocks long.
How many small blocks does she need altogether?
4³
4 cubed means 4 multiplied by itself 3 times
4³ = 4 × 4 × 4
Step 1 of 3
Katie is building a cube out of small wooden blocks. Each edge of her cube is 4 blocks long.
How many small blocks does she need altogether?
Katie needs 64 small blocks to build her cube.
The key insight: Cubing is NOT the same as multiplying by 3. It means multiplying the number by itself THREE times!
Common mix-up: 4³ = 12 (thinking 4 × 3). The small 3 tells you HOW MANY times to multiply 4 by itself, not what to multiply 4 by.
These are the misconceptions we see most often in cube numbers, including the ones our practice questions are specifically designed to catch.
Struggling with cube numbers? The real gap is often in one of these earlier topics.
Sitting the SEAG test this November? Read our last-month revision plan, Paper 1 vs Paper 2 and test day guide.
SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.
Free to start · no card needed