Question

what are those numbers whose unit,s digit of the cube is equal to the same number?​

Answer 1

Answer:

86 via step to 45via tri. 78

Answer 2

0,1,4,5,6 and 9 are those  numbers whose unit  digit of the whose cube is equal to the same number

Cube of a number is number multiplied by number three times

a³ = a x a x a

Need to find numbers, unit digit of whose cube is equal to the number.

Hence Number must be of 1 Digit only.

Hence Checking all digits cube

Number    Cube    Unit Digit of Cube

0                 0                 0                         SAME

1                  1                  1                           SAME

2                 8                 8                       DIFFERENT

3                27                7                       DIFFERENT

4                64                4                         SAME

5             125                  5                         SAME

6              216                 6                         SAME

7               343                3                    DIFFERENT

8              512                 2                    DIFFERENT

9              729                9                          SAME

Hence, 0,1,4,5,6 and 9 are those  numbers whose unit  digit of the whose cube is equal to the same number  

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