themaninblack@lemmy.world to memes@lemmy.world · 3 months agoMath(s)lemmy.worldimagemessage-square35linkfedilinkarrow-up1583
arrow-up1583imageMath(s)lemmy.worldthemaninblack@lemmy.world to memes@lemmy.world · 3 months agomessage-square35linkfedilink
minus-squareVerito@lemm.eelinkfedilinkarrow-up4·3 months 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)