Let’s take a example

For number 29

Unit digit of 29 3 = Unit digit of 9 3

     = Unit digit of 729

    = 9

 

For number 77

Unit digit of 77 3 = Unit digit of 7 3

   = Unit digit of 343

  = 3

 

For number 3331

Unit digit of 3331 3 = Unit digit of 1 3

           = Unit digit of 1

         = 1

 

For number 8888

Unit digit of 8888 3 = Unit digit of 8 3

         = Unit digit of 512

       = 2

 

For number 149

Unit digit of 149 3 = Unit digit of 9 3

         = Unit digit of 729

       = 9

 

For number 1005

Unit digit of 3331 3 = Unit digit of 5 3

           = Unit digit of 125

         = 5

For number 1024

Unit digit of 8888 3 = Unit digit of 4 3

         = Unit digit of 64

       = 4

For number 5022

Unit digit of 149 3 = Unit digit of 2 3

         = Unit digit of 8

       = 8

 

For number 53

Unit digit of 53 3 = Unit digit of 3 3

    = Unit digit of 27

    = 7

  1. Chapter 7 Class 8 Cubes and Cube Roots
  2. Concept wise
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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.