In order to answer our question, we need to know the value of √3.
Now, what we can say about √3 without using a calculator is that
In other words, √3 must lie between √4 and 1.
The above inequality can be rewritten as
Now, we have two points between 2 and 1, namely B and C; our question, therefore is which one of these points is √3?
Now 3 is more close to 4 than 1; therefore, we expect √3 to be the point which is closer to 2; hence, our best guess at the value of √3 is the point C.