themaninblack@lemmy.world to memes@lemmy.world · 2 days agoMath(s)lemmy.worldimagemessage-square42fedilinkarrow-up1570arrow-down128
arrow-up1542arrow-down1imageMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 2 days agomessage-square42fedilink
minus-squareiknowitwheniseeit@lemmynsfw.comlinkfedilinkarrow-up2·12 hours agoWhy? 19 is 15+4 but is still prime?
minus-squareVerito@lemm.eelinkfedilinkarrow-up4·12 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)