@[email protected] to [email protected] • 7 months agoMath(s)lemmy.worldimagemessage-square42fedilinkarrow-up1585
arrow-up1585imageMath(s)lemmy.world@[email protected] to [email protected] • 7 months agomessage-square42fedilink
minus-square@[email protected]linkfedilink23•7 months agoWell, on the surface, it’s just 60-3, so clearly divisible by 3 itself. Now 221, that’s some fuckery.
minus-square@[email protected]linkfedilink2•7 months agoDammit, it was right in the post, why did that take me so long?
minus-square@[email protected]linkfedilink4•7 months agoWhen I was young I learned that when you add up all the numbers if that number is a multiple of 3 than the original number is also divisible by 3. So 51, 5+1=6 and 6 divisible by 3 and so must 51.
Well, on the surface, it’s just 60-3, so clearly divisible by 3 itself. Now 221, that’s some fuckery.
Dammit, it was right in the post, why did that take me so long?
When I was young I learned that when you add up all the numbers if that number is a multiple of 3 than the original number is also divisible by 3. So 51, 5+1=6 and 6 divisible by 3 and so must 51.