h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

31st of January 1982 wasn't a Sunday

Oh, hang on - I'm 100 years out, aren't I?

When you concatenate all of the integers from 1 to 173 left-to-right in base 3 or base 6 you get a prime number.

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is this a math term or a typo???

concatenate=juxtapose

swap 'em round you mean???

Link together, chain, join up.

Remove the spaces or gaps.

oh....concentrate??????

The German submarine U-1206 was sunk by a faulty toilet.

8281807978...987654321 is the only known prime of its kind (I may have said before). In base 7, beginning with either 373 or 1825 (1042 or 5215 in base 7) also gives primes. In base 13, no example has yet been found of this sort of prime (I'm sure you're all dying to know what the first one is there, and I'll let you know when I know).

Submarine toilets are called 'heads'

Therefore German Submarine toilets are 'Kaput'

and not only submarines

c'mon Icy, tell us why

The German for diarrhoea is durchfall. Which literally translates to "through-fall"

Wikipedia tells you why they were called heads: http://en.wikipedia.org/wiki/Head_(watercraft)

(Originally placed at the head of sailing ships, so that wave action flushed them out)

Ah, then not hanging over the back end shouting "Heads" in case the admiral was doing the same from his stateroom below?

What, then, does a naval headhunter do?

If on a ship they are heading somewhere, does this m mean they will be butting into someone?

Y.