All none zero numbers are significant.... therefore in 51.223 there are 5.
4 significant figures.
5 significant figures.
5 significant figures.
5 significant figures.
There are 5 significant figures in 65001g.
5 significant figures.
5 significant figures.
5 significant figures.
5 significant figures.
5 significant figures.
5 significant figures.
5 significant figures.