# What is the cube root of a number ? Definition and examples.

The cube root of a number is one of three equal factors of that number.

For example, 5  × 5 × 5 = 125 and 5 is one of the three equal factors of 125. Therefore, 5 is the cube root of 125.

More examples of cube roots

The cube root of 1 is 1 because 1  × 1 × 1 = 1

The cube root of 8 is 2 because 2  × 2 × 2 = 8

The cube root of 27 is 3 because 3  × 3 × 3 = 27

The cube root of 64 is 4 because 4  × 4 × 4 = 64

You can also find the cube root of a negative number.

For example, the cube root of -8 is -2 since  -2  × -2 × -2 = -8

The cube root of a number could also be a real number.

For example, the cube root of 10 is about 2.15 since 2.15
× 2.15 × 2.15 is closely equal to 10.

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