There are six significant figures in this number (i.e. all the figures here are significant).
6 of them.
Three significant figures are in this number.
There are 3 significant figures in this number.
There are 4 significant figures in this number.
There are 3 significant figures in this number.
There are 3 significant figures in this number.
There are 3 significant figures in this number.
There are 3 significant figures in this number.
There are 3 significant figures in this number.
There are 2 significant figures in this number.
There are 4 significant figures in this number.
There are 5 significant figures in this number.