Question

Given the numbers : $161\text{cm},0.161\text{cm},0.0161\text{cm}$. The number of significant figures for the three numbers is:

• A. 3, 3 and 4 respectively
• B. 3, 4 and 4 respectively
• C. 3, 4 and 5 respectively
• D. 3, 3 and 3 respectively

Answer 1

The correct option is D 3, 3 and 3 respectively

Zeros placed left to the number are never significant, therefore the no. of significant figures for the numbers $161\text{cm},0.161\text{cm}$ and $0.0161\text{cm}$ are same, i.e., $3$.