0580/12 Feb/Mar 2024, Question 21: Upper and Lower Bounds
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
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The question, in short
Given a rope length of 18.7 m rounded to the nearest 10 centimetres, complete the inequality showing the range of possible values for l.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1Nearest 10 cm = 0.1 m, so half is 0.05 m
- 2Lower bound = 18.7 − 0.05 = 18.65
- 3Upper bound = 18.7 + 0.05 = 18.75
- 418.65 ≤ l < 18.75
Answer18.65 18.75
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