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Find If the Following Number is a Perfect Cube? 1728 - Mathematics

Sum

Find if the following number is a perfect cube?
1728

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Solution

1728

2 1728
2 864
2 432
2 216
2 108
2 54
3 27
3 9
3 3
  1

 

 

 

 

 

 

 

 

 

 

∵ 1728 = 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3
= (2)3 x (2)3 x (3)3 
∵  1728 is a perfect cube.

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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 4 Cubes and Cube Roots
Exercise 4 (A) | Q 2.5 | Page 47
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