Question

How to round 32.6721 according to the number of significant digits.

Answer 1

It really depends on how many significant digits you need to round it to. It has 6 significant digits.
To round to 5 it would be 32.672
To 4 would be 32.67
To 3 would be 32.7
To 2 would be 33
To 1 would be 30