0580/12 Feb/Mar 2025, Question 20: Upper and Lower Bounds
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Non-calculator · 2 marks
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The question, in short
The height h of a building is 635 m to the nearest metre. Complete the inequality showing the range of possible values of h.
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Solution · 2 marks
- 1Half of 1 m is 0.5 m
- 2Lower bound = 635 − 0.5 = 634.5
- 3Upper bound = 635 + 0.5 = 635.5
Answer634.5 ≤ h < 635.5
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