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O-LevelMathematicsNumber4024/11 · Oct/Nov 2025 · Q92 Marks

By writing each number correct to 1 significant figure, work out an estimate for the value of √102.5 × 8.7 / 27

  1. By writing each number correct to 1 significant figure, work out an estimate for the value of √102.5 × 8.7 / 27[2]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2025). The mark or mark type is shown in brackets.

  1. [2] 100, 9 and 30 seen as rounded values and final answer 3
  2. [B1] for two of 100, 9, 30 as rounded values seen

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About this question

Topic
Number, O-Level Mathematics (syllabus 4024). Structured question, 2 marks.
Source
O-Level Mathematics, Oct/Nov 2025 Paper 1 Variant 1, question 9.

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