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  4. The number of significant figures for the three numbers 161 cm, 0.161 cm, 0.0161 cm

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Q. The number of significant figures for the three numbers$ 161\,cm, 0.161 \,cm, 0.0161\, cm$

AIPMTAIPMT 1998Some Basic Concepts of Chemistry

Solution:

(d) (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 digit 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. $3$.