Write the units digit of the cube of each of the following numbers:

31, 109, 388, 4276, 5922, 77774, 44447, 125125125

i) 31


To find unit digit of cube of a number we do the cube of unit digit only.


Here, unit digit of 31 is = 1


Cube of 1 = 13 = 1


Therefore, unit digit of cube of 31 is always be 1.


ii) 109


To find unit digit of cube of a number we do the cube of unit digit only.


Here, unit digit of 109 is = 9


Cube of 9 = 93 = 729


Therefore, unit digit of cube of 109 is always be 9.


iii) 388


To find unit digit of cube of a number we do the cube of unit digit only.


Here, unit digit of 388 is = 8


Cube of 8 = 83 = 512


Therefore, unit digit of cube of 388 is always be 2.


iv) 4276


To find unit digit of cube of a number we do the cube of unit digit only.


Here, unit digit of 4276 is = 6


Cube of 6 = 63 = 216


Therefore, unit digit of cube of 4276 is always be 6.


v) 5922


To find unit digit of cube of a number we do the cube of unit digit only.


Here, unit digit of 5922 is = 2


Cube of 2 = 23 = 8


Therefore, unit digit of cube of 5922 is always be 8.


vi) 77774


To find unit digit of cube of a number we do the cube of unit digit only.


Here, unit digit of 77774 is = 4


Cube of 4 = 43 = 64


Therefore, unit digit of cube of 77774 is always be 4.


vii) 44447


To find unit digit of cube of a number we do the cube of unit digit only.


Here, unit digit of 44447 is = 7


Cube of 7 = 73 = 343


Therefore, unit digit of cube of 44447 is always be 3.


viii) 125125125


To find unit digit of cube of a number we do the cube of unit digit only.


Here, unit digit of 125125125 is = 5


Cube of 5 = 53 = 125


Therefore, unit digit of cube of 125125125 is always be 5.


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