# How many significant digits does the number 0.0034 have?

##### 1 Answer

Two significant digits (3 and 4)

#### Explanation:

For zeros, the rule of significant digits can be tricky, but here are the general rules:

In this case, there are three significant digits: 607

This number contains four significant digits (all the zeros are significant because they come after a non-zero digit and are after the decimal point).

And this notation is not seen as often, but I'll include it anyway:

Since the first zero has a bar over it, then this number has two significant digits (the last zero is not a significant digit- there is no bar over it).