Which of the following readings cannot be determined with a meter rule?
A
2.56cm
B
2.25cm
C
2.50cm
D
2.05cm
Verified Correct Answer: A.
Physical Principles & Numerical Solution
Meter rule has a reading accuracy of 0.5mm or 0.05cm, thus measurement is M \pm 0.05cm i.e 2.00, 2.05, 2.50, 2.55 etc.
The reading that cannot be read is 2.56cm.
Source: Myschool Past Questions Archive (Record #55831)