Unit digit of cube of any number will be the unit digit of cube of its last digit

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 1005 ³ = Unit digit of 5 ³

           = Unit digit of 125

         = 5

For number 1024

Unit digit of 1024 ³ = Unit digit of 4 ³

         = Unit digit of 64

       = 4

For number 5022

Unit digit of 5022 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