One piece of advice that I think you’ll find handy,
A gem for your very own modus op’randi,
It’s something I learnt the hard way when young,
When trying to sleep on a bed trés well sprung.

Having surmised I was missing a pillow
I decided to use a young armadillo,
But then every time that I drifted asleep
He moved, and I fell from the bed in a heap;

He was trying to help but suffered from cramp,
And needed to walk and have a good stamp,
And so if you find you are in this position
I suggest that you find a friendly mathematician:

I’ve found that they are lovely and pliant,
And given a problem will lie there compliant
And not move a muscle whilst solving a riddle
With only one drawback – right down the middle!