The diagram below shows a section of a micrometer screw gauge.
![Diagram showing section of a micrometer screw gauge](https://www.easyelimu.com/images/form_2_past_papers/term_1/Diagram_showing_section_of_a_micrometer_screw_gauge.JPG)
- State the smallest measurement that can be made by the measurement that can be made by the micrometer screw gauge.
- What is the correct reading of the micrometer screw gauge if it has an error of 0.25cm