themaninblack@lemmy.world to memes@lemmy.world · 1 day agoMath(s)lemmy.worldimagemessage-square42fedilinkarrow-up1559arrow-down128
arrow-up1531arrow-down1imageMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 1 day agomessage-square42fedilink
minus-squareUnrepententProcrastinatorlinkfedilinkarrow-up6·10 hours agoAll the magic goes when you understand it’s 30+21
minus-squareiknowitwheniseeit@lemmynsfw.comlinkfedilinkarrow-up2·6 hours agoWhy? 19 is 15+4 but is still prime?
minus-squareVerito@lemm.eelinkfedilinkarrow-up4·6 hours 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)