Significant Figures (or Digits) are the bane of many students and, therefore, teachers. This is a pretty straightforward guide to help students identify which figures (or digits!) are significant, and which aren't.
I have two of the same sheet - one with significant figures and one with significant digits, as I have found some folk to be adamant about using one or the other!
There are answers at the bottom of the sheet, so students can check themselves.