themaninblack@lemmy.world to memes@lemmy.world · 6 months agoMath(s)lemmy.worldimagemessage-square43linkfedilinkarrow-up1580arrow-down129
arrow-up1551arrow-down1imageMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 6 months agomessage-square43linkfedilink
minus-squareForeverComicallinkfedilinkarrow-up8·6 months agoAll the magic goes when you understand it’s 30+21
minus-squareiknowitwheniseeit@lemmynsfw.comlinkfedilinkarrow-up3·6 months agoWhy? 19 is 15+4 but is still prime?
minus-squareVerito@lemm.eelinkfedilinkarrow-up4·6 months agoBecause 30 and 21 are both divisible by the same number, 3.
All the magic goes when you understand it’s 30+21
I always thought it’s 31+20
Why? 19 is 15+4 but is still prime?
Because 30 and 21 are both divisible by the same number, 3.
Exactly 3(10+7)