0580/31 May/Jun 2025, Question 27: Upper and Lower Bounds
Cambridge IGCSE Mathematics 0580 · Paper 31 (Core) · Calculator · 2 marks
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The question, in short
The height h of a building is 105 m to the nearest metre. Complete the error interval statement giving the lower and upper bounds for h.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1Half of 1 m = 0.5 m
- 2Lower bound = 105 − 0.5 = 104.5
- 3Upper bound = 105 + 0.5 = 105.5
Answer104.5 ≤ h < 105.5
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