Question

If ones digit of the square of a number is 9,then what can be the possible digit in the ones place of its cube​

Answer 1

Answer:

7 or 3

Step-by-step explanation:

Posssibities of unit digit of a square number is 9 is the numbers unit digit must be either 3 or 7

if it is 3..for eg take case of 13 13^2=169,13^3=2197..unit place is '7'

if unit digit of a number is 7 for eg,

17..17^2=289 and its cube is 17^3=4913..unit digit of cube is '3'

hence possibilities are either 7 or 3