Memorisation is caching. If you need 11-times or 12-times tables, you will calculate them enough many times that your cache will become "hot" and you remember

Memorisation is caching. If you need 11-times or 12-times tables, you will calculate them enough many times that your cache will become "hot" and you remember them out of the box. If you don't, then you don't have enough use for those multipliers.