A length is given as 8 m correct to the nearest metre. What is the upper bound of the length?
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Practise IGCSE 0580 questions in the style of recent Extended past papers, organised by syllabus subtopic. Each set comes with an examiner-style mark scheme and a downloadable worksheet.
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These Limits of accuracy Topical Past Paper Questions are written in the style of recent Cambridge IGCSE Mathematics 0580 Extended papers and grouped by the Number (E1.10) section of the 2025–2027 syllabus. Use them to revise the exact skills examiners test in this part of the course.
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Give upper and lower bounds for data rounded to a specified accuracy. Extended candidates also find bounds of the results of calculations that use rounded data.
A length is given as 8 m correct to the nearest metre. What is the upper bound of the length?
The mass of an object is 47 kg, correct to the nearest kilogram. State the lower bound of the mass.
[1 mark]A distance d, in metres, is 120 m correct to the nearest 5 metres. Complete the statement: ____ ⩽ d < ____
[2 marks]The length of a side of a square tile is given as 6.4 cm, correct to 1 decimal place.
Write down the lower bound of the length.
[1 mark]Write down the upper bound of the length.
[1 mark]A car's speed is given as 30 km/h correct to 2 significant figures. The lower bound of the speed is:
A rectangular card has length 12 cm and width 7 cm, each measured to the nearest centimetre.
Find the upper bound of the area of the card.
[2 marks]Find the lower bound of the perimeter of the card.
[1 mark]x = 8.5 and y = 3.2, each correct to 1 decimal place. Find the upper bound of x − y.
[2 marks]Two values are p = 4.6 and q = 2.3, each correct to 1 decimal place. Find the upper bound of p ÷ q, correct to 3 decimal places.
[2 marks]