themaninblack@lemmy.world to memes@lemmy.world · 15 days agoMath(s)lemmy.worldimagemessage-square39fedilinkarrow-up1576arrow-down128
arrow-up1548arrow-down1imageMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 15 days agomessage-square39fedilink
minus-squareSeeker of Carcosa@feddit.uklinkfedilinkEnglisharrow-up10·15 days 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.
minus-squareemmanuel_car@fedia.iolinkfedilinkarrow-up3·15 days agoThere’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.