How many significant figures in 10.001?

Answer 1

There are five significant figures in 10001. The 1s are significant because they are non-zero digits. The zeros are significant because they are "captured" zeros, meaning they are between non-zero digits.

Answer 2

Five. All nonzero numbers are significant and any zeros in between significant digits are significant.

Answer 3

All five of them

Answer 4

5 of them.

Answer 5

3