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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Updated on: 10-Oct-2022

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