Question

What must be added to 1018 to make it a perfect cube?

Answer 1

We know that,
${10}^{3} = 1000$
and
${11}^{3} = 1331$
And we also know that, 1000<1018<1331,
.: The perfect cube, nearest and greater to 1018 is 1331

.: The smallest number, that must be added to 1018, to make it a perfect cube = 1331-1018 = 313
.: your answer is 313...

Answer 2

Answer:

We know that,

{10}^{3} = 100010

3

=1000

and

{11}^{3} = 133111

3

=1331

And we also know that, 1000<1018<1331,

.: The perfect cube, nearest and greater to 1018 is 1331

.: The smallest number, that must be added to 1018, to make it a perfect cube = 1331-1018 = 313

.: your answer is 313...