Random number challenge

[Von Fugal]

<quote name="Andrew Jorgensen" date="Wed, 11 Jun 2008 at 19:54 -0600">
> This comes up every month at PLUG (for door prizes) so I thought I'd ask here.  What's an easy to remember way to generate a random number between 1 and some given number.  Language doesn't matter so long as the code is easy enough for someone to remember the entire thing and type it up at the drop of a hat.
> 
> Go, lazylist, go! 

Binary grab bag? A stash of coins? Parallelized flipping?

Von Fugal
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