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Which of the following is a perfect cube?
1. 270
2. 2700
3. 256
4. 216

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Correct Answer - Option 4 : 216

Calculation 

⇒ 270 = 3 × 3 × 3 × 2 × 5 

⇒ 2700 = 3 × 3 × 3 × 2 × 5 × 2 × 5 

⇒ 256 = 4 × 4 × 4 × 4 

⇒ 216 = 6 × 6 × 6 

In above factorisation we clearly seen, 

In factorisation of 216 we get 3 sixes 

∴ 216 is a perfect square 

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