Visualise `2. 665` on the number line, using successive magnification.

Explanation

We know that `2.665` lies between `2` and `3`.
So, we divide the number line into `10` equal parts and mark each point of division.
The first mark on the right of `2` will be `2.1` followed by `2.2` and so on.
The point left of `3` will be `2.9`.
Now, the magnified view of this will show that `2.665` lies between `2.6` and `2.7`. So, our focus will be now 2.6 and `2.7`. We divide this again into `10` equal parts.
The first part will be `2.61` followed by `2.62` and so on.
We now magnify this again and find that `2.665` lies between `2.66` and `2.67`.
So, we magnify this portion and divide it again into `10` equal parts.
The first part will represent `2.661`, next will be `2.662` and so on.
So, `2.665` will be `5th` mark in this subdivision.