CAIE IGCSE Mathematics Extended E1.10 Limits of accuracy Question Bank

Practise finding bounds from rounded measurements and using them in lengths, speeds, areas, density and formula calculations.

Syllabus
2028–2030
Topic
E1.10
Level
Extended

Exam points

  • choose the correct upper or lower bound for each rounded measurement in the calculation
  • calculate maximum or minimum values by selecting bounds in formulae
  • apply bounds to perimeter, area, volume or remaining-length calculations from context

Covered syllabus points

E1.10.1 Give upper and lower bounds for data rounded to a specified accuracy.E1.10.2 Find upper and lower bounds of the results of calculations which have

E1.10 Limits of accuracy question 1

[Maximum number: 3]

A rectangle has an area of 9400 cm29400 \mathrm{~cm}^{2}, correct to the nearest 100 cm2100 \mathrm{~cm}^{2}.

The length of the rectangle is 80 cm , correct to the nearest 10 cm .
Calculate the upper bound of the width of the rectangle.

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