@themaninblack@lemmy.world to memes@lemmy.world • 2 months agoMath(s)lemmy.worldimagemessage-square39fedilinkarrow-up1578arrow-down129
arrow-up1549arrow-down1imageMath(s)lemmy.world@themaninblack@lemmy.world to memes@lemmy.world • 2 months agomessage-square39fedilink
minus-squareSeeker of CarcosalinkfedilinkEnglish10•2 months agoDivisibility by 3 rule is real. If the sum of the digits of a number is divisible by 3, then the number itself is also divisible by 3. Same goes with 9. There’s an 11 rule, but it’s a bit convoluted.
Divisibility by 3 rule is real. If the sum of the digits of a number is divisible by 3, then the number itself is also divisible by 3. Same goes with 9. There’s an 11 rule, but it’s a bit convoluted.
There’s also a rule 34, but it’s super advanced.