Powderhorn@beehaw.org to Technology@beehaw.orgEnglish · 5 months agoThe Math Hack You Didn’t Know Was in Your Credit Cardwww.scientificamerican.comexternal-linkmessage-square7fedilinkarrow-up127arrow-down11file-text
arrow-up126arrow-down1external-linkThe Math Hack You Didn’t Know Was in Your Credit Cardwww.scientificamerican.comPowderhorn@beehaw.org to Technology@beehaw.orgEnglish · 5 months agomessage-square7fedilinkfile-text
I’ve been familiar with the concept, but this is by far the best behind-the-scenes explanation I’ve seen.
minus-squarecmnybo@discuss.tchncs.delinkfedilinkEnglisharrow-up2·5 months agoThe check digit is to catch a mistyped number.
The check digit is to catch a mistyped number.