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Significant figure penalties An A-level paper may contain up to 2 marks (1 mark for AS) that are contingent on thecandidate quoting the final answer in a calculation to a specified number of significantfigures (sf). This will generally be assessed to be the number of sf of the datum with theleast number of sf from which the answer is determined. The mark scheme will give therange of sf that are acceptable but this will normally be the sf of the datum (or this sf -1).The need for a consideration will be indicated in the question by the use of ‘Give youranswer to an appropriate number of significant figures’. An answer in surd form cannotgain the sf mark. An incorrect calculation following some working can gain the sf mark.