Bootstrap 3 .col-xs-offset-* doesn't work?

Question

I am using bootstrap 3 grid system loved it so far and everything was working well, I am trying to use col-xs-offset-1 and doesn\'t work although .col-sm-offset-1 works. What

Answer 1

col-md-offset-4 does not work if you manually apply margin to the same element. For example

In the above code, offset will not be applied. Instead a margin of 0 auto will be applied