How do you know my PIN

As of the 23rd May 2022 this website is archived and will receive no further updates. 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.

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Buying several items in Waterstones bookshop, I was rather disconcerted that the sales assistant read out my PIN number when I inserted my card for payment, as in, "That'll be ****, Sir." It just happened that the cost of the goods I had purchased exactly matched my PIN. I didn't feel it would be wise to say, "Hey, that's an amazing coincidence!"
Total votes: 93
Date submitted:Sun, 03 Apr 2022 15:39:01 +0000Coincidence ID:12702