I believe that the starting block has been changed, but the test fixture hasn't been changed in a way that invalidates all the incorrect old submissions.

In fact, test.randomNumber() only returns positive integers! Which are randomNumbers, but so is this:

http://xkcd.com/221/

so we could get random-numbers with

Math.ceil( Math.PI )

but I digress... I DID change the number to:

Test.randomNumber() - Test.randomNumber()

But I should use even

( Test.randomNumber() - Test.randomNumber() ) / Test.randomNumber()

But then original solutions like these would be damned - what a difficult choice I have to make ;)

Or you could calculate the sign:

  var c = ( b / Math.abs( b ) );

Is that spoiler content, or not?

You definitively managed to confuse me, thanks also for the links...

Good point. Its easy enough to polyfill though.