Lets try to find the cube of each option and think about the natural numbers.
What is the definition of a cubed number?
How much is needed yet to make it 5 cubed? Sum of which two numbers can take us there?
Can we do the prime facotrisation of 243?
Let us try with the prime facotrisation.
A number is always a factor of itself. So do we need to add the perfect cube of other factors to it?
Let us try it with some numbers.
Can we calculate the volume of cuboid? How many such cuboids are required to make a cube?
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