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Dealing with significant figures

Confused by significant figures? Many people are. A lack of care when presenting the answers to calculations or reporting results from lab work can lead to a loss of marks through use of an inappropriate number of significant figures. Tim Harrison provides advice to help you succeed

Significant figures are the digits that carry meaning within a number. The rules about which digits are regarded as significant can be summarised as:

■ All the non-zero digits are significant.

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Focus on the basics

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Colourants: where does colour come from?

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