# Cubes

The first six cube numbers are –

1, 8, 27, 64, 125, 216

They are equal to –

1 × 1 × 1, 2 × 2 × 2, 3 × 3 × 3, 4 × 4 × 4, 5 × 5 × 5, 6 × 6 × 6

– which can be written more neatly as –

1^{3}, 2^{3}, 3^{3}, 4^{3}, 5^{3}, 6^{3}

– where the small ^{3} means cubed.

The cube of 5 is 125, and working backwards, we say the cube root of 125 is 5.

There is a connection between cube numbers and cube shapes. If you use cube shaped bricks to build a larger cube, the number of bricks you need is a cube number. For example, if you wanted to build an 8cm cube using 1cm cube bricks you would need 512 bricks which is the cube of 8.

*The first four cubes.*

Based on the book *Numbers: Facts, Figures & Fiction*.