X-Nico

Birthday problem

An informal demonstration of the problem can be made from the list of Prime Ministers of Australia, of which there have been 27, in which Paul Keating, the 24th Prime Minister, and Edmund Barton, the first Prime Minister, share the same birthday, 18 January.

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The history of the problem is obscure, but W. W. Rouse Ball indicated (without citation) that it was first discussed by an "H. Davenport", possibly Harold Davenport.

see also