Question

A metre scale is graduated at every millimetre. How many significant digits will be there in a limo measurement with this scale ?

Answer 1

The metre scale is graduated at every milimetre

1 m = 1000 mm

The minimum number of significant digit may be 1 (e.q for measurements like 5 mm,, 7mm etc.) and the maximum number of significant digits may be 4 (e.q. 1000 mm). Hence the number of significant digits may be 1,2,3 or 4.