Which of the numbers is a perfect cube?

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21600

216000

2160

2160000

answer is B.

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Detailed Solution

The given numbers are 21600, 216000, 2160, 2160000.
A perfect cube must have three or a multiple of three zeroes at the end.
By using the above condition in the given options, 21600, 216000, 2160, 2160000.
The number in option 3, 216000 has three zeros at the end.
Therefore, 216000 is a perfect cube.
Hence, option 2 is correct.

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