Question

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

• A. $3,4,5$
• B. $3,3,3$
• C. $3,3,4$
• D. $3,4,4$

Answer 1

Answer: (B)

$3,3,3$

(i) All non zero digits are significant.

(ii) Non zero digits to the right of the decimal point are significant.

(iii) Zeroes to the left of the first non-zero digits in a number are not significant.

So, the number of significant figures for the numbers 161 cm, 0.161 cm and 0.0161 cm are same i.e., 3

Hence, option B is correct.