CAIE IGCSE Mathematics Core C1.10 Limits of Accuracy Questions

Practise finding limits of accuracy for rounded measurements by completing lower-bound and upper-bound inequality statements.

Exam points

complete inequalities for rounded lengths, masses, distances and counts
choose the half-unit adjustment from the stated accuracy,

Covered syllabus points

C1.10.1 Give upper and lower bounds for data rounded to a specified accuracy

[Maximum number: 2]

The height, h metres, of a fence post is $2.43\,\mathrm{m}$ , correct to the nearest centimetre.
Complete the statement about the value of h.

$......\leqslant h<......$

$2.425\leqslant h<2.435$
B1 for each
If zero scored, SC1 for $242.5\leqslant h<243.5$ or for both correct but reversed

[Maximum number: 2]

The height, h metres, of a tower is 128 m, correct to the nearest metre.

Complete the statement about the value of h.

[Maximum number: 2]

Elize, Lily and Marco start a business.

The length, l m, of a roll of ribbon is 120 m, correct to the nearest metre.

Complete this statement about the value of l.
$\leqslant l <$

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Covered syllabus points

Question 1

Question 2

Question 3