Find the square root of 169

By prime factorisation, we know:

169 = 13 x 13

As we can see, there is one pair of 13.

Now, by taking the square root on both sides.

√169 = √(13 x 13)

Take out the number under root in pairs.

√169 = 13

Answer

Hence, the square root of 169 is 13.