How to find the Square root of 169?

Given: Square root of 169.

To find: We have to find the square root of 169.

Solution: 

First write 169 as product of its prime factors:

169 = 13 $\times $ 13 = $13^2$

Now,

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

$\sqrt{169}=13$

So, the square root of 169 is 13.