Question

Given the numbers : 161, 0.161 and 0.0161. The number of significant figures for the three numbers is :

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

Answer 1

The correct option is B 3, 3 and 3 respectively

Leading zeros are not significant. Thus, the given numbers 161, 0.161 and 0.0161 contain 3 significant figures.
The digits 1, 6 and 1 are significant.