What is the reliability of measurement of length using a metre scale ?

Least count of a metre scale is?

Least count of a metre scale is

You are provided three scales A, B and C as shown in Fig. 10.6 to measure a length of 10 cm. For the correct measurement of the length you will use the scale

If ten students are asked to measure the length of a piece of cloth up to a mm, using a metre scale, do you think their answers will be identical? Give reasons.

The precaution while measuring length with metre scale is-