When a decimal point is present, all zeros between that decimal point and a digit are significant digits.When a decimal point is not present, any zero not trapped between two nonzero digits are insignificant:103 has 3 sf's1030 has 3 sf's1030. has 4 sf's1030.00 has FIVE sf's00010.0 has 3 sf'sSince your limiting value is 2.0, which hereby has TWO significant digits, the answer 10.24 must be rounded to have TWO significant digits. 10.24 raw has four significant digits10.2 would be THREE significant digits10. would be two significant digits.To clear things up.. The answer is not just "10", but "10.".It has to have a decimal point for that zero in the units' place to count.

__________________
Yahoo!