Accuracy of a measurement means:

Precision of a measurement depends mainly on:

If repeated readings are close to each other but not near the true value, they are:

How many significant figures are in 2.40 mm?

When rounding off, if the first dropped digit is greater than 5, the retained digit is:

Which zero is significant?

Which rounding rule applies when the first dropped digit is less than 5?

Significant figures include:

Which statement correctly describes a non-physical quantity?

For an analogue instrument, the maximum uncertainty is commonly taken as:

Why were standard units introduced?