@[email protected] to [email protected] • 4 months agoMath(s)lemmy.worldimagemessage-square42fedilinkarrow-up1586
arrow-up1586imageMath(s)lemmy.world@[email protected] to [email protected] • 4 months agomessage-square42fedilink
minus-squareSeeker of CarcosalinkfedilinkEnglish10•4 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.