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Page last updated at 09:12 GMT, Monday, 4 April 2011 10:12 UK

How good are your code-breaking skills?

The FBI is using the internet to get amateur code-breakers to try and crack the coded messages found in the pocket of Ricky McCormick, a 41-year-old American who was found murdered in a cornfield in Missouri 12 years ago.

The Today Programme has invited Marcus du Sautoy, professor for the public understanding of science at the University of Oxford, to have a go.

Get in touch with Today via email , Twitter or Facebook or text us on 84844.


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