Which of the following readings cannot be determined with a meter rule?

A. 2.56cm
B. 2.25cm
C. 2.50cm
D. 2.05cm

Correct Answer: Option A

A. 2.56cm

Explanation

Meter rule has a reading accuracy of 0.5mm or 0.05cm, thus measurement is M ± 0.05cm i.e 2.00, 2.05, 2.50, 2.55 etc.
The reading that cannot be read is 2.56cm.