How many significant figures is in the measurement 0.0102030?

Answer 1

The number 0.0102030 has 6 significant figures. Each of the non-zero numerals (3 of those), the zeros between the non-zero numbers (2), and the zero on the end of the number if it is right of the decimal (1). The significant figures are in bold:

0.0102030

Answer 2

There are seven significant figures in the measurement 0.0102030.