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Find If the Following Number is a Perfect Cube? 243 - Mathematics

Sum

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
∴ 279 is not a perfect cube.

Concept: Concept of Cube Root
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 4 Cubes and Cube Roots
Exercise 4 (A) | Q 2.1 | Page 47
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