I read a very funny book donkey's years ago about a nurse. Can't remember mucgh about the story, but "slowly sailing cooking peas, sweetly sailing past my elbow" is a mnemonic for some bones or other.

At school we had a choice of "Oliver has a handful of apples" or "some officers have curly auburn hair to offer attraction" for trig functions (sin = opposite/hypoteneuse, cos = adjacent/hyp, tan = opp/adj). Yes, I know they don't all have the same number of letters; you were supposed to learn "sin, cos, tan".

I sat down and learned pi to 20 decimals when I was 14! Can't remember it now.

Years back, we had a letter from ... was it British Telecom or the GPO then? ... which said our area code and phone number was changing: from 05433 78221 to 0543 378221 ... spot the difference! (And don't try ringing the number: it's changed again a few times, and we don't live there any more.)

Steve