Talsystemer i Alice i eventyrland?
Hvilke talsystemer snakker hun i og hvad er forklaringen på det?''SHE'S she, and I'm I, and-oh dear, how puzzling it all is! I'll try if I know all the things I used to know. Let me see: four times five is twelve, and four times six is thirteen, and four times seven is-oh''