620

submitted 7 months ago by randomaccount43543@lemmy.world to c/xkcd@lemmy.world

74 comments fedilink hide all child comments

Alt text:

Bonus question: Where is London located? (a) The British Isles (b) Great Britain and Northern Ireland (c) The UK (d) Europe (or 'the EU') (e) Greater London

you are viewing a single comment's thread
view the rest of the comments

[-] j4yt33@feddit.de 9 points 7 months ago

8 (about Goldbachs conjecture) is one that I don't quite get. Isn't the number 8 already proof that this isn't true (sum of 4+4)?

[-] MarcomachtKuchen@feddit.de 46 points 7 months ago

8 is the sum of 5+3 both of which are primes. I think the Conjecture just states that there is a sum of two primes not every sum consists only of primes

[-] j4yt33@feddit.de 5 points 7 months ago

Ah gotcha! I thought it meant exclusively prime numbers

[-] hushable@lemmy.world 2 points 7 months ago

7+1

[-] cori@lemmy.blahaj.zone 15 points 7 months ago

1 is not a prime number. It would have to be 3+5

[-] Ardyssian@sh.itjust.works 1 points 7 months ago* (last edited 7 months ago)

~~Then wouldn't 4 fail the conjecture? 4 = 1+ 3 but 1 is not a prime.~~

Nevermind my sleepy self somehow thought 2 isn't a prime number :)

this post was submitted on 21 Apr 2024

620 points (99.2% liked)

xkcd

8866 readers

87 users here now

A community for a webcomic of romance, sarcasm, math, and language.

founded 1 year ago

MODERATORS

koraro@lemmy.world