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 × b × b then “a” said to be a perfect cube.
The number 216 is a perfect cube because it can be written as 6 × 6 × 6.
1000 is also a perfect cube number as it can be written as 10 × 10 × 10.
64 is not a perfect cube number because it can be written as 8 × 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.