Question

Given the numbers: 161 cm, 0.161 cm, 0.0161 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

Explanation :

Zeros placed left to the number are never significant, therefore the no. of significant figures for the numbers.

161 cm = 0.161 cm and 0.0161 cm are same, i.e 3