this post was submitted on 04 Jun 2026
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Mildly Interesting
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This is for strictly mildly interesting material. If it's too interesting, it doesn't belong. If it's not interesting, it doesn't belong.
This is obviously an objective criteria, so the mods are always right. Or maybe mildly right? Ahh.. what do we know?
Just post some stuff and don't spam.
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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.