Question

The significant figures in $1.0024,1.240$ and $0.0020$ are respectively:

• A. 5, 4, 2
• B. 3, 3, 1
• C. 5, 3, 4
• D. 5, 3, 2

Answer 1

Answer: (A)

In $1.0024$, all figures are significant. In $1.240$,the significant figures are four (zero tells about precision). Zero before a number are not significant, hence $0.0020$ has only two significant numbers ( 2 and 0 after 2).