Math is simple. 1, 2, 3, 4, 5, and so on.
Ponies are not simple. They don't add up like regular numbers do, and just because one answer is four and the other is one does not mean the bigger number is necessarily greater.
Twilight experiences this inequality first hoof when one friend is pitted against four, and she is forced to choose a side, whether she wants to or not.
This story is officially cancelled. You can read my thoughts about it and why this happened here.