Question

Given the numbers: $161cm,0.161cm,0.0161cm.$ The number of significant figure for the three numbers are

• A. $3,4\text{and}5$
• B. $3,3\text{and}3$
• C. $3,3\text{and}4$
• D. $3,4\text{and}4$

Answer 1

The correct option is C $3,3\text{and}4$

We know that all non-zero digits are significant and the zero at the beginning of a number are not significant. Therefor number $161cm,0.161cm$ and $0.0161cm$ have $3,3$ and $4$ significant figures respectively.

Hence, option $C$ is the correct answer.