PUZZLET 013

Pounds, Shillings, and Pence

Up
until 1971, the British used imperial currency: pounds, shillings, and
pence. There were 12 pence to the shilling, and 20 shillings to
the pound. Up until about 1960, there were halfpennies (2 to the
penny). Up until about 1950, there were farthings (2 to the
halfpenny, 4 to the penny). |

A certain sum in pounds, shillings, and pence, expressed as a five-digit integer, contains as many farthings as the five-digit integer. There are no halfpennies or farthings in the sum. What is it?

Example: 9 pounds, 15 shillings, 11 pence. Call it 91511. If it equalled 91511 farthings, it would be the answer, but it happens to equal 9404 farthings.

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Last Updated: January 7th, 2010.