themaninblack@lemmy.world to memes@lemmy.world · 7か月前Math(s)lemmy.worldimagemessage-square36fedilinkarrow-up1520arrow-down129
arrow-up1491arrow-down1imageMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 7か月前message-square36fedilink
minus-squareSeeker of Carcosa@feddit.uklinkfedilinkEnglisharrow-up9·7か月前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.
minus-squareemmanuel_car@fedia.iolinkfedilinkarrow-up2·7か月前There’s also a rule 34, but it’s super advanced.
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.