253 has three significant figures. (Any digit that is not a trailing or leading zero is a significant figure.)
* * * * *
Actually, a trainiling zero AFTER a decimal point IS an indicator of the degree of accuracy of the number and so is a sf.
there are 3 sig figs. 4, 0, and 5 are the sig figs
5 sig figs
6.002 has four sig figs.
There are five sig figs in 4.1275.
There are two sig figs in 3700000.
there are 3 sig figs. 4, 0, and 5 are the sig figs
5 sig figs
There are four sig figs in 1.032
There are four sig figs in 2.905.
6.002 has four sig figs.
There are four sig figs in 60.55.
There are eight sig figs in 57.115102.
There are five sig figs in 4.1275.
There are two sig figs in 3700000.
There are 4 sig figs in 20.13
61 has 2 sig figs.
There are five sig figs