Question

Which of the following numbers is a perfect
cube? Show your reasoning.
(a) 648
(b) 1125
(c) 512
(d) 9261
​

Answer 1

Answer ->

9261 is the cube root of 21

As

21 × 21 × 21 = 9261

So the cube of 21 is 9261

Option D is correct

Now,

512 is the cube root of 8

As

8 × 8 × 8 = 512

So the cube of 8 = 512

Option C is also correct.

Thanks! ☺