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Matching $10 And $20 Serial Numbers

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 Posted 08/21/2023  10:34 pm Show Profile   Bookmark this topic Add TheSerialFlorist to your friends list Get a Link to this Message Number of Subscribers
I wasn't trying, but first time I've ever found matching serial numbers on two bills in the wild where neither is a $1 bill. To try to do this deliberately would require around 7,000 of each denomination just to have a 50-50 chance of finding a match, so it's pretty cool.

Matching-$10-And-$20-Serial-Numbers
Edited by TheSerialFlorist
08/22/2023 7:24 pm
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SteveInTampa's Avatar
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 Posted 08/22/2023  12:13 am  Show Profile   Bookmark this reply Add SteveInTampa to your friends list Get a Link to this Reply
That's nifty. What are the odds ?
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nickelsearcher's Avatar
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 Posted 08/22/2023  05:20 am  Show Profile   Bookmark this reply Add nickelsearcher to your friends list Get a Link to this Reply
Interesting connection.
Take a look at my other hobby ... http://www.jk-dk.art
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Coinfrog's Avatar
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 Posted 08/22/2023  08:28 am  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
Very cool, congrats! How did you come across them?
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jbuck's Avatar
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luckyrollers's Avatar
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 Posted 08/22/2023  11:33 am  Show Profile   Bookmark this reply Add luckyrollers to your friends list Get a Link to this Reply
must have took a while for you to match both of the notes.
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 Posted 08/22/2023  12:00 pm  Show Profile   Bookmark this reply Add TheSerialFlorist to your friends list Get a Link to this Reply
I just came across them randomly, wasn't specifically trying to match anything. I've been able to search for and find two $1 bills that match, but always thought it'd be impossible to find two non-$1, just extremely fortunate to have the right handful of bills at the right time.

Not directly related, when you guys reply on here, how do you copy a quote from an earlier post and then paste it so your reply is aimed at the specific quote and not the entire thread?
Edited by TheSerialFlorist
08/23/2023 01:00 am
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 Posted 08/22/2023  12:20 pm  Show Profile   Bookmark this reply Add Tavi888 to your friends list Get a Link to this Reply
If You own a "Brick" the odds 1to 100000.
(10x10x10x10x10 BBB)
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 Posted 08/22/2023  2:49 pm  Show Profile   Bookmark this reply Add nick10 to your friends list Get a Link to this Reply
the FAQ has quoting instructions
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 Posted 08/22/2023  3:16 pm  Show Profile   Bookmark this reply Add TheSerialFlorist to your friends list Get a Link to this Reply

Quote:
the FAQ has quoting instructions


Thank you very much Nick10!
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cashhound's Avatar
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 Posted 08/22/2023  3:51 pm  Show Profile   Bookmark this reply Add cashhound to your friends list Get a Link to this Reply

Quote:
That's nifty. What are the odds ?


Agree!
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 Posted 08/22/2023  8:25 pm  Show Profile   Bookmark this reply Add Tavi888 to your friends list Get a Link to this Reply
(SerialFlor)
"50-50 chance" are in soccer game, flipping coins
by the referees...
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 Posted 08/24/2023  12:00 pm  Show Profile   Bookmark this reply Add TheSerialFlorist to your friends list Get a Link to this Reply

Quote:
That's nifty. What are the odds ?


Odds on finding a match depend on how many bills you have.
--If I have only one $10 and one $20 odds are 1/96 million that the serial numbers match.
--I actually had a strap (100 bills) of each denomination, the chances that there would be a match was 1/9600, so again I was incredibly fortunate to find it, especially not looking for it.
--re: the referee's coin flip: If I had ~7000 of each denomination bill, there would be a 50-50 chance there is a match...half the time yes, half the time no.
Edited by TheSerialFlorist
08/24/2023 12:05 pm
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 Posted 08/24/2023  4:40 pm  Show Profile   Bookmark this reply Add Tavi888 to your friends list Get a Link to this Reply
to fancyflor math (7000)
The Daily4 lottery means 10,000 combinations
(0000-9999) If I buy 5000 tickets, the chance is almost 50/50 (not so cool). So 60 years ago in my case it was 8th grade math...
I hope you are not a mathematician...
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 Posted 08/29/2023  01:54 am  Show Profile   Bookmark this reply Add TheSerialFlorist to your friends list Get a Link to this Reply
@tavi888, I may not know much about combinations but let me take a stab.

What you learned in eighth grade math is correct. If you buy 5000 tickets against a 1/10,000 drawing, the chances are indeed 50-50 of finding a ticket that matches the drawing.

In ninth grade math we learned about sets. A set of 6928 $10s and a set of 6928 $20s, multiplied together, creates 48 million combinations out of 96 million possible serial numbers, and there's your 50% chance of finding a match. In the lottery, you need so many lottery tickets because you only have a single winning drawing in your second set.

5000 tickets x 1 drawing = 5000 combinations out of 10,000 possible outcomes = 50% chance winning.half the time yes, half the time no.
6928 $10s x 6928 $20s = 48M combinations out of 96M possible outcomes = 50% chance finding a matching $10 and $20. half the time yes, half the time no.

I'm not sure exactly what was your critique or what was your your better answer, but my math is right and I hope this helps. If you have a different answer or don't understand something, there's a respectful way to ask or to challenge someone. Having said that, welcome to the CCF!
Edited by TheSerialFlorist
08/29/2023 2:12 pm
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nss-52's Avatar
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 Posted 08/29/2023  09:11 am  Show Profile   Check nss-52's eBay Listings Bookmark this reply Add nss-52 to your friends list Get a Link to this Reply
An aside: In PA the lottery only pays 1/2 the actual odds.

For example, in a 3 digit lottery, the "3 digits in exact order" odds are 1/1000. So a $1 gamble should pay $1000, but in PA the winner only gets $500
https://www.palottery.state.pa.us/d...chances.aspx

OK, back to your regularly scheduled topic.
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