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Programming Enigma Puzzles
I am about to get on the bus, but I don’t have the exact money for the £1 fare. The driver doesn’t give change so I hand over more than £1 and they keep the excess.
Once I have sat down, I realise that even though I didn’t hand over all my coins, the amount of money I had with me was the largest possible amount I could have had in change without being able to pay £1 (or any multiple of £1) exactly.
How much did I have?