Question

How do i find the square root of a number

Answer 1

Answer:

Using the Guess Method

Explanation:

Finding the square root of a number is an automatic action in tools such as calculator and Excel without any rationale behind it. Hence, I find it more useful to describe as I learned at school: the guess and approach method (it can go by various other names).

The square root of a number is ‘a number which produces a specified quantity when multiplied by itself’.  

The Guess Method is guessing that number by approximation until getting exactly the right one.

For example, we want to know the square root of, let’s say, 144. We know that 10*10 is 100. That’s close. Let’s add 1 to that. 11*11 is 121. Getting closer! 12*12 is… 144! Right on! Therefore, the square root of 144 is 12.

I used that technique every time I had to do the math by hand, no matter the number. I thought of a number that could be somewhat close enough (I would guess! Got the method name now? Lol) and adjust until I got my answer right.