Powderhorn@beehaw.org to Technology@beehaw.orgEnglish · 4 days agoThe Math Hack You Didn’t Know Was in Your Credit Cardwww.scientificamerican.comexternal-linkmessage-square7linkfedilinkarrow-up137arrow-down14file-text
arrow-up133arrow-down1external-linkThe Math Hack You Didn’t Know Was in Your Credit Cardwww.scientificamerican.comPowderhorn@beehaw.org to Technology@beehaw.orgEnglish · 4 days agomessage-square7linkfedilinkfile-text
I’ve been familiar with the concept, but this is by far the best behind-the-scenes explanation I’ve seen.
minus-squareBrad@beehaw.orglinkfedilinkarrow-up14·4 days agoA car’s 17-digit VIN has a similar feature, for model years since 1981. The 9th digit is the check digit, and it’s a much more complex algorithm (since the VIN can have numbers and letters.)
A car’s 17-digit VIN has a similar feature, for model years since 1981.
The 9th digit is the check digit, and it’s a much more complex algorithm (since the VIN can have numbers and letters.)