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.