Re: Education is no longer designed to teach.
"This being El Reg someone will now write about how useful 12x12 can be for some obscure reason."
You need it for mentally calculating a gross of eggs @ tuppence three farthings each. Supermarkets these days apparently sell eggs in cartons of 6, 8, 9, 10, 12, 15, 18, 20, 24, 30. There is even a 30 dozen shipping box.