# The next Piccadilly line train is leaving from ....

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understandinguncertainty.org was produced by the Winton programme for the public understanding of risk based in the Statistical Laboratory in the University of Cambridge. The aim was to help improve the way that uncertainty and risk are discussed in society, and show how probability and statistics can be both useful and entertaining.

Many of the animations were produced using Flash and will no longer work.

Kings Cross Station now not only has a platform 9$\frac{3}{4}$, but also a platform 0. And for the numerically challenged, there are repeated announcements that *'customers are advised that Platform 0 is situated next to Platform 1'*

I suppose the Underground platforms will now have to be given complex numbers.

[That is an unofficial entry from the Department of Pure Mathematics and Mathematical Statistics, University of Cambridge, for next year's Round Britain Mathematical Joke competition.]

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## Comments

Michael Power (not verified)

Sat, 19/11/2011 - 5:59pm

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## Platform Numbering

"And for the numerically challenged, there are repeated announcements that 'customers are advised that Platform 0 is situated next to Platform 1' "

The station at Newcastle upon Tyne do not have a Platform 0, but the platform numbering is designed to challenge assumptions that it reflects the sequence passengers see as they walk from one side to the other. As platform 11 is the first platform, this is rather inconvenient when you don't know the system and have 1 minute to find your train.

mrc7

Mon, 21/11/2011 - 4:54pm

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## Platform numbering

Kate Bellingham (not verified)

Sat, 19/11/2011 - 10:57pm

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## Platform Numbering

david

Sat, 03/12/2011 - 6:55pm

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## negative and complex numbers

If they started building platforms in York Road, these would be negative as they are the other side of 0. But the underground platforms are

belowplatforms 0,1,2 etc, so they form a new dimension, and is analogous to mathematical idea of the complex plane. But after all this explanation the joke seems a bit weak, to be honest!Geoff Smith (not verified)

Sun, 20/11/2011 - 7:14pm

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## Platform numbering

Ken Rice (not verified)

Wed, 23/11/2011 - 4:50am

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## That is an unofficial entry .

That is an unofficial entry ... for next year's Round Britain Mathematical Joke competition.tk (not verified)

Fri, 25/11/2011 - 12:28pm

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## Uncertainty