@[email protected] to [email protected] • 4 months agoMath(s)lemmy.worldimagemessage-square42fedilinkarrow-up1586
arrow-up1586imageMath(s)lemmy.world@[email protected] to [email protected] • 4 months agomessage-square42fedilink
minus-square@[email protected]linkfedilink8•4 months agoAll the magic goes when you understand it’s 30+21
minus-square@[email protected]linkfedilink4•4 months agoBecause 30 and 21 are both divisible by the same number, 3.
All the magic goes when you understand it’s 30+21
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)
I always thought it’s 31+20