Given the numbers : $$161cm, 0.161cm, 0.0161 cm$$. The number of significant figures for the three numbers are
A
$$3, 3$$ and $$3$$ respectively
B
$$3, 4$$ and $$5$$ respectively
C
$$3, 3$$ and $$4$$ respectively
D
$$3, 4$$ and $$4$$ respectively
Correct option is B. $$3, 3$$ and $$3$$ respectively
- $$\text{as all non-zero digits are significant}$$
- $$\text{and the zeros at the beginning of a number are not significant.}$$
- $$\text{the zeros trailing decimal point are not significant.}$$
Therfore number $$\text{161 cm, 0.161 cm and 0.0161 cm have 3,3 and 3 significant figures respectively}$$