themaninblack@lemmy.world to memes@lemmy.world · 25 days agoMath(s)lemmy.worldexternal-linkmessage-square42fedilinkarrow-up1583
arrow-up1583external-linkMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 25 days agomessage-square42fedilink
minus-squareUnrepententProcrastinator@lemmy.calinkfedilinkarrow-up8·24 days agoAll the magic goes when you understand it’s 30+21
minus-squareiknowitwheniseeit@lemmynsfw.comlinkfedilinkarrow-up3·24 days agoWhy? 19 is 15+4 but is still prime?
minus-squareVerito@lemm.eelinkfedilinkarrow-up4·24 days 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)