themaninblack@lemmy.world to memes@lemmy.world · 2 days agoMath(s)lemmy.worldexternal-linkmessage-square42fedilinkarrow-up11arrow-down10
arrow-up11arrow-down1external-linkMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 2 days agomessage-square42fedilink
minus-squareiknowitwheniseeit@lemmynsfw.comlinkfedilinkarrow-up0·13 hours agoWhy? 19 is 15+4 but is still prime?
minus-squareVerito@lemm.eelinkfedilinkarrow-up0·13 hours 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)