The given diagram represents a screw gauge. The circular scale is divided into
50 divisions and the linear scale is divided into millimetres. If the screw advances by
1 mm when the circular scale makes
2 complete revolutions, find the least count of the instrument and the reading of the instrument in the figure.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1718744/original_SG.png)