Question

Given the numbers : 161 cm, 0.161 cm, 0.0161 cm. The number of
significant figures for the three numbers are
(a) 3, 4 and 5 respectively
(b) 3, 3 and 4 respectively
(c) 3, 3 and 3 respectively
(d) 3, 4 and 4 respectively

Answer 1

(b) 3, 3 and 4 respectively

Explanation:

All non-zero numbers are significant. Also zeros at the right of the number are significant, but not on the left of the number.

So number of significant figures in 161 is 3.

number of significant figures in 0.161 is 3.

number of significant figures in 0.0161 is 3.

Option B is the answer.

Answer 2

Answer:

161= 3 significant figures

0.161= 3 significant figures

0.0161= 3 significant figures

so,option C is right answer

Explanation:

Given the numbers : 161 cm, 0.161 cm, 0.0161 cm. The number of

significant figures for the three numbers are

(a) 3, 4 and 5 respectively

(b) 3, 3 and 4 respectively

(c) 3, 3 and 3 respectively

(d) 3, 4 and 4 respectively