Did you study cubes topic in mathematics? And do you know **what are perfect cubes**? This topic has very much importance. In NCERT class 8 mathematics book, if you see one entire chapter is allotted to study about **cubes** and cube roots.

The meaning of cube is three. I think you know how to find the cube of any number. If any number is multiplied thrice then the result will be a cube of that number. As we learnt cube now we will know **what are perfect cubes**? And its definition.

**Perfect cubes definition:**

If “a” is any number and if it is written as b x b x b then “a” said to be a perfect cube.

Example:

The number 216 is a perfect cube because it can be written as 6 x 6 x 6.

1000 is also a **perfect cube number** as it can be written as 10 x 10 x 10.

64 is not a perfect cube number because it can be written as 8 x 8. Here there are two 8’s only but perfect cube means three 8’s should be there.

I hope you understood **what are perfect cubes** and how to say that the given number is **perfect cube or not**.

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