What is the square root of 169?
The answer is 13
This is the principal root.
The root can be
We are looking for a number which, multiplied by itself makes 169.
It is a huge advantage in your Maths to know all the squares up to
If you find it by estimating, the number 9 at the end means that the square root must end in a 3 or a 7.
The only options are