Mathematics for IGCSE & O level - Limits Of Accuracy (Section 3 - No. 26)
The length of a sheet of paper is said to be 26 cm to the nearest cm. What does this mean regarding the accuracy of the measurement?
The actual length is exactly 26 cm.
The actual length is between 25 cm and 27 cm.
The actual length is closer to 26 cm than any other whole number.
The actual length is between 25.5 cm and 26.5 cm.
Explanation
When a measurement is to the nearest centimetre, the value can be up to half a centimetre below and up to (but not including) half a centimetre above the stated measurement.
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