Learn when FILTER beats XLOOKUP, when it does not, and how to handle multiple matches, nth items, and multi-condition lookups with clear steps.

The asterisk (*) is the wildcard character that represents any sequence of characters, including when there are no characters ...

The @ symbol can also appear in regular formulas outside of tables when Excel thinks you're trying to reference a single value from a range. If you see it pop up unexpectedly, it usually means Excel ...

For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...