Looking at the
algorithm tag in SO, I noticed that there are 6452 questions reported:
Yet going to the tag info page, at the same time it found 6455 of them
Earlier this morning this was true for
Delphi: 5799 against 5800. This is not the case at the moment.
But it is true right now for
math: 2751 against 2752.
Math does not yet have a tag wiki, so it does not depend on this.
There just seem to be different counting algorithms that produce different results at times.