0580/11 May/Jun 2026, Question 22: Upper and Lower Bounds
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Non-calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Given a race winner's time of 12.7 seconds rounded to 3 significant figures, complete the inequality giving the range of possible values of t.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 13 significant figures here means to the nearest 0.1
- 2Half of 0.1 is 0.05
- 3Lower bound = 12.7 − 0.05 = 12.65, upper bound = 12.7 + 0.05 = 12.75
Answer12.65 ≤ t < 12.75
Stuck on a step? Read the free lesson: Upper and Lower Bounds
Practise more upper and lower bounds questions
Real 0580 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on upper and lower bounds
Also searched as: 0580/11/M/J/26 · 0580_s26_qp_11 · 0580 s26 11 · question 22.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.