4024/11 Oct/Nov 2025, Question 9: Estimation
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 2 marks
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The question, in short
Round each number to 1 significant figure to estimate (√102.5 × 8.7) ÷ 27.
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Solution · 2 marks
- 1√102.5 ≈ √100 = 10, 8.7 ≈ 9, 27 ≈ 30
- 2(10 × 9)/30 = 90/30 = 3
Answer3 (from rounded values 100, 9 and 30)
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