Cambridge Coincidences Collection

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

understandinguncertainty.org 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.

Many of the animations were produced using Flash and will no longer work.

Well I Never!

Professor David Spiegelhalter of Cambridge University wants to know about your coincidences!

The number 69

I had my horse freeze marked, I had no choice in the numbers they are totally random - the only two numbers amongst the letters were 69 I bought an old Landrover, I didn't notice until I had it that the number plate said 69 (no other numbers) I moved house, when we got the paperwork I noticed the house number is 69 I started a new job, got my payslip and my payroll number is 69! What are the chances of that?

Family connections

I will have to shorten this story quite a bit! - I originate from Hertfordshire and moved to Norfolk 14 years' ago. Some time ago I was investigating my family tree and friended my mother's 2nd cousin on facebook. A little while ago I noticed a picture of him in my local pub, when I asked him what he was doing there he told me he lived down the road (in the village my son went to school) - quite a coincidence being as this side of my family were from West Susses. I then started talking to his daughter and it turned out she worked in a school directly with one of my friends, she then moved school and coincidentally moved to a school (in the next county) that my boyfriend's children go to and I am seriously considering moving my son to. When talking to my mother, I asked her if I had told her that my 3rd cousin on her side of the family was a teacher where Charlie was likely to be going to school. She said I had and wondered if a lady she used to work with in the 60's who married a distant relation of hers, and she knew was in Norfolk, might be related.

Strange connection

My mother moved to Rugby, we had always lived in Hertfordshire, Bedfordshire or London for a couple of generations. She was talking to a couple of ladies that were now her neighbours. They were discussing where they had previously lived. They described a flat on the King's Road in London that they had lived in in the 70's with a man that lived above them with various distinguishing features including two young children. This turned out to be my father (and at the time my mother's ex-husband), the children were my brother and me.

Lost diamond

I was helping my children ride their pony. After we had finished I noticed my grandmother's diamond was missing from her engagement ring that I wear all of the time. I hunted and hunted for it but as my yard was surrounded by gravel did not find it. I went back inside, walked out of the back door, saw a glint from the sun being reflected from something and it was my diamond shining in the middle of a big gravel drive.

unknown cousin moves next door

my mother comes from a large family and only kept in contact with a couple of her siblings. when i was growing up i knew one of her sisters lived in Benalla (a town 40 mins drive from the town I grew up in) but I had never met her or her family. I also knew the names of her 5 children but that was all and I never gave them or any of my other estranged relatives a thought over the years. i left home at 17 and moved to melbourne where i lived for 10 yrs and then i moved to Benalla (a town of 8000 people )having by then completely forgotten about the fact that i had relatives living there. after a couple of months the new house next door was completed and i made friends with Cyndie, the young single mum who moved into it. it wasnt until i met her mother, Wilma when she came to visit one day that i finally realized that Cyndie was my cousin. when i put the 2 names (both a little unusual) together I realized.

lost cousin moves in next door

my mother comes from a large family and only kept in contact with a couple of her siblings. when i was growing up i knew one of her sisters lived in Benalla (a town 40 mins drive from the town I grew up in) but I had never met her or her family. I also knew the names of her 5 children but that was all and I never gave them or any of my other estranged relatives a thought over the years. i left home at 17 and moved to melbourne where i lived for 10 yrs and then i moved to Benalla (a town of 8000 people )having by then completely forgotten about the fact that i had relatives living there. after a couple of months the new house next door was completed and i made friends with Cyndie, the young single mum who moved into it. it wasnt until i met her mother, Wilma when she came to visit one day that i finally realized that Cyndie was my cousin. when i put the 2 names (both a little unusual) together I realized.

ruby ruby

as i walked from my loungeroom to my kitchen i started singing (loudly) ruby ruby, the song by dion de mucci from the 50's, (a rare song that not many people know and i rarely sing), and i turned on the radio and that was the song that was playing!

old friend

The other day I was having a conversation with my brother about a family friend. Not knowing a lot about this person's past (this person is very private) I started looking up this person via Google. I came across someone with the exact same name and looked identical to the person I was looking up. The person I found was well lets just say not someone you would want anyone to know you are associated with. We then called the family friend asking if he had heard of this other person and he said yes along with a few other choice words, he knew that this person looked just like him, same birth date, born in the same country, same age, build everything. Yet was not him. He knew that this person was in prison in a different country and why (probably having been harassed every time he flew out of the country) . Just curious of the odds that this would occur and yet not be related (or known relation)??

Donnie Darko

I have trouble getting up in the morning, standard for most people. I can set multiple alarms on my iPhone and none of them will even stir my sleep. I became frustrated that I couldn't find something to wake me, I tried several things around the house that I could set an alarm to wake me. Eventually I came to an old Quarts clock that has sat on a mantle piece for as long as I can remember. It also hasn't worked for all that time, but that wasn't due to the actual clock, but because of a missing back panel that held a single AAA battery into place. So I walk up my room to set it on my bed side table and as I do I tested if the clock works if I push the battery in. The battery looked as though it was dead and so I gave up on that idea pretty quickly and set my trusty iPhone alarm. The old Quartz clock stayed there for a couple of months because I I'm lazy and my room rarely gets cleaned. After all this time I was watching Donnie Darko on Netflix, a movie I've seen dozens of times. The story revolves around a boy who's mentally troubled and the theme of this story revolves around a 'countdown' to the end of something.

answered before I rang

This is partly a response to "Who phone who?" My name is Peter. The (true) story about the "chance discovery of parallel family" is mine. That struck me as interesting because you can prove the whole thing and loosely calculate the probabilities. As a family we have experienced lots of odd coincidences, mainly unlikely meetings. However, I have twice picked up a phone to ring somebody and found myself speaking to the person that I intended to ring because, by coincidence a couple of seconds earlier, she had phoned me and I had picked up the phone in the instant before it rang. These were quite different occasions and involved different people several years apart. They were single calls, not part of a series of calls, and they were not pre-planned. The one person I spoke to frequently, the other less frequently and that was still odder because it was from a pay phone that I had used before but she had no reason to think I would be there. These events seem pretty surprising to me but not really astounding given that we did quite often speak by phone.

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