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Question
Find if the following number is a perfect cube?
243
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Solution
243
| 3 | 243 |
| 3 | 81 |
| 3 | 27 |
| 3 | 9 |
| 3 | 3 |
| 1 |
∵ 243 = 3 x 3 x 3 x 3 x 3
= (3 x 3 x 3) x 3 x 3
= 33 x 3 x 3
∴ 243 is not a perfect cube.
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