Which zero is significant in the number 50,540? what is the other zero called?

Consider the number 50,540. We have to determine the significant figure.

Significant figures are the digits that carry meaning contributing to its measurement resolution. It excludes the leading and trailing zeroes.

The first zero in the 50 is considered to be a significant number, while the second zero (in the 540) is not significant number.

The second zero is a called a placeholder zero. It can be removed by converting the number into scientific notation.