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

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

Options

(a) 3,4,5 respectively
(b) 3,4,4 respectively
(c) 3,3,4 respectively
(d) 3,3,3 respectively

Correct Answer:

3,3,3 respectively

Explanation:

We know that all non-zero digits are significant and the zeros at the beginning of a number are not significant. Therfore number 161 cm, 0.161 cm and 0.0161 cm have 3,3 and 3 significant figures respectively

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