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What would be the possible ones digit of the square root of the natural number 6561?
Given :
Given number is 6561.
To do :
We have to find the the possible ones digit of the square root of the natural number 6561.
Solution :
We know that,
If a number has 1 or 9 in the unit’s place, then its square ends in 1.
This implies,
The possible unit digit of the square root of a number ending in 1 is 1 or 9.
The possible unit digit of the square root of the number 6561 is 1 or 9.
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