themaninblack@lemmy.world to memes@lemmy.world · 2 years agoMath(s)lemmy.worldimagemessage-square41linkfedilinkarrow-up1566
arrow-up1566imageMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 2 years agomessage-square41linkfedilink
minus-squareiknowitwheniseeit@lemmynsfw.comlinkfedilinkarrow-up3·2 years agoWhy? 19 is 15+4 but is still prime?
minus-squareVerito@lemm.eelinkfedilinkarrow-up4·2 years agoBecause 30 and 21 are both divisible by the same number, 3.
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)