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My $1 bill has no repeating decimals in its serial number
(sh.itjust.works)
I think you mean "numerals" (or just "numbers"). 😅😬
Digits would work best
That's what she said. sigh
Thanks - I was so confused before you cleared it up for me
No no, they're on to something. No repeating decimals too!
There are no decimals in the serial number, therefore there are also no repeating decimals
Every whole number has infinite repeating decimals of zero, kinda.
They're implied, kinda.
Now do your credit card.
It's not possible because that's 16 digits.
Let me be the judge of that. Maybe you missed it, let me verify it for you.
Base 16 would like a word.
Credit card numbers are in base 10
What if they are generated in base 16, but numbers containing a-f are discarded. Did you think about that? Huh?
Yes. The check digit is calculated using base 10
Seems to be correct, I was thinking of a different card in my wallet.
Ahem I mean I fancypants McGee have the 16 element identity permutation for my card number!
Everything is in base 10 (unless it's in unary).
not if i debase your currency >:3
I'd personally enjoy it if it was you doing the debasing
Base ten then
Please tell me base 16 isn't trying to hex-a-decimal
hey neat! I have that exact same bill!
Now that's an interesting firing order.
None of this 1-8-7-2-6-5-4-3 or 1-8-4-3-6-5-7-2 nonsense, no
Just 8-4-3-1-6-7-2-5 👌
fun fact: 1$ bill weighs almost exactly 1 gram and you idiots don't even use the metric system.
We might consider it if you updated the definition so that 1 gram was exactly the weight of a US dollar
A nickel is 5 grams and you don't use the metric system either.
Fun fact, all US customary units are defined in terms of the metric system. For example, 1 inch is exactly 2.54cm. which means a US mile is 1.609344km. Americans have be using a bastardized version of the metric system since 1959.
It actually changes based on how much cocaine and human fluids it absorbs. That sounds like a joke, but I used to calibrate currency scales. There would be one setting for regular bills, and one for crisp, brand new ones; those would weigh measurably less and required compensation.
I can’t help but wonder how you noticed this
I heard somewhere recently that the length of a USD One Dollar bill is the average human penis length
US bills are 6.14 inches (156 mm) wide, which is significantly larger than the average US penis size (5.16 inches).
https://www.science.org/content/article/how-big-average-penis
A 6.3 inch erect penis is larger than 95% of men.
Well okay, but the average width is still 2.61 inches, surely
Pretty sure that's the 5 euro note mate.
This is very satisfying
Someone figure out the probability!
If I remember high school math correctly, The first digit can be anything so, 10/10 options, the second digit cant be be the first so only 9/10 options, then 8/10 for the third, continue this pattern for each digit and multiply together you get 1.8% chance.
10 x 9 x 8... etc. yields 1,814,400 possible combinations of no repeats, right? I'm confused what the "whole" is if this is expressed as a percent.
100 000 000, the number of possible serial numbers.
Aha, that makes sense. Thanks.
“Well doggies, Ain’t that something!”
~Jed Clampett~A sequential bill
Approximately 10987654*3/10^8 so about 0.0018144 I think?
You might be able to get more than a dollar for it from a collector. There are numismatists that like interesting serial numbers. Probably won't get a lot since they aren't in order but who knows.
this post was submitted on 04 Jun 2026
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