this post was submitted on 08 Jan 2025
542 points (95.3% liked)

memes

10844 readers
3687 users here now

Community rules

1. Be civilNo trolling, bigotry or other insulting / annoying behaviour

2. No politicsThis is non-politics community. For political memes please go to [email protected]

3. No recent repostsCheck for reposts when posting a meme, you can only repost after 1 month

4. No botsNo bots without the express approval of the mods or the admins

5. No Spam/AdsNo advertisements or spam. This is an instance rule and the only way to live.

Sister communities

founded 2 years ago
MODERATORS
 
you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 2 points 12 hours ago (1 children)

Why? 19 is 15+4 but is still prime?

[–] [email protected] 4 points 12 hours ago (1 children)

Because 30 and 21 are both divisible by the same number, 3.

[–] [email protected] 2 points 7 hours ago

Exactly 3(10+7)