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Using the Method of Successive Subtraction Examine Whether Or Not the Following Numbers is Perfect Cube 792 . - Mathematics

Sum

Using the method of successive subtraction examine whether or not the following numbers is perfect cube 792 . 

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Solution

We have: 

792
 1  
791
 7  
784
  19  
765
  37  
728
  61  
667
  91  
576
 127 
449
 169 
280
 217 
63

∵  The next number to be subtracted is 271, which is greater than 63.

∴  792 is not a perfect cube.

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APPEARS IN

RD Sharma Class 8 Maths
Chapter 4 Cubes and Cube Roots
Exercise 4.3 | Q 2.3 | Page 21
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