C.1.1—Significant figures

Use an appropriate number of significant figures and report results consistently with the precision of raw data and the least accurate measurement.

Use c.1.1—significant figures to connect the rule to the data and decision in the question.

This matters because c.1.1—significant figures determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply c.1.1—significant figures to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: C.1.1—Significant figures is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.