Question

The unit digit of square root of 169 is

(a) 13

(b) 3

(c) 1

(d) none of these​

Answer 1

Answer:

(a) 13 is a correct answer

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Answer 2

Answer:

The unit digit of square root of 169 is 3

Step-by-step explanation:

Given :

we are given the square of a number 169

To Find :

The unit digit of square root of 169

Solution :

Since we are given the square of a number 169

First we have to find the square root of 169

Factors of 169 = 13 x 13

Hence

$\sqrt{169}=\sqrt{13 \ \text{x} \ 13} = \sqrt{(13)^2} = 13$

Hence we have calculated that the square root of 169 = 13

Therefore the unit digit of 13 is 3

Hence option (b) is the correct answer

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