0580/23 May/Jun 2022, Question 21: Upper and Lower Bounds
Cambridge IGCSE Mathematics 0580 · Paper 23 (Extended) · Calculator · 3 marks
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The question, in short
Neha's 23 cm ribbon (nearest cm) has an 87 mm piece (nearest mm) cut off. Find lower and upper bounds for the remaining length, in centimetres.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1Ribbon: 22.5 ≤ length < 23.5 cm; piece 87 mm: 8.65 ≤ piece < 8.75 cm
- 2Lower bound = 22.5 − 8.75 = 13.75 cm
- 3Upper bound = 23.5 − 8.65 = 14.85 cm
- 413.75 and 14.85
Answer13.75 and 14.85
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Also searched as: 0580/23/M/J/22 · 0580_s22_qp_23 · 0580 s22 23 · question 21.
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