What is a cube number? Simple Definition and Examples

Definition

A cube number is a whole number multiplied by itself twice, written with a small 3.

Example

2³ = 2 × 2 × 2 = 8, and 3³ = 27. The first cubes are 1, 8, 27, 64 and 125.

Tip

A cube number counts the little cubes that make a bigger cube.

Practise it

Quick check: try these

Work each one out on paper, then tap the question to see the answer.

6² =
Answer: 36
5² =
Answer: 25
12² =
Answer: 144
13² =
Answer: 169

Learn it in depth

Cube number is part of Cubes and Cube Roots for Class 8: notes, formulas, solved examples with every step, common mistakes and ten practice questions with answers. Want a teacher to go through it with you? See Class 8 maths tuition.

Related words

Square number, Exponent (power)

FAQ

Cube number: questions

What is a cube number?

A cube number is a whole number multiplied by itself twice, written with a small 3. 2³ = 2 × 2 × 2 = 8, and 3³ = 27. The first cubes are 1, 8, 27, 64 and 125.

What is a common mistake with cube number?

A cube number counts the little cubes that make a bigger cube.

Where do students learn cube number?

Cubes and Cube Roots is usually taught in Class 8, and the ideas come back in later classes. Chapter names and order differ by board and textbook, so follow your own textbook. We have a full page with notes, solved examples and practice questions.

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