My kid sent me this reel showing several different ways that people hold their fingers to count to 10 which I guess is somewhat culturally derived, I responded by sending them a video of someone counting to 31 in binary using 5 finger "bits" and pointed out that with 10 "bits" one can count to 1023, kinda blew their mind and they immediately tried it. When trying some of the weirder finger arrangements they said, "this is like speed running carpal tunnel!"
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