Mathematics for IGCSE & O level - Limits Of Accuracy (Section 2 - No. 39)
A sheet of paper is measured to be 26 cm long to the nearest centimeter. Which of the following ranges represents the possible length of the paper?
25 cm ≤ length < 27 cm
25.5 cm ≤ length < 26.5 cm
26 cm ≤ length < 27 cm
26 cm ≤ length ≤ 27 cm
Explanation
The measurement is to the nearest centimeter, so the lower bound is 25.5 cm and the upper bound is 26.5 cm. The length can't actually be 26.5 or the measurement would round up to 27.
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