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
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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
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