Science Memes

10923 readers

2182 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

Rules

Don't throw mud. Behave like an intellectual and remember the human.
Keep it rooted (on topic).
No spam.
Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.

Research Committee

[email protected]

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago

MODERATORS

[email protected]

674

And 299999999 is divisible by 13 (lemmy.world)

submitted 3 days ago by [email protected] to c/[email protected]

36 comments fedilink hide all child comments

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

[–] [email protected] 13 points 3 days ago (2 children)

If all of the digits summed recursively reduce to a 9, then the number is divisible by 9 and also by 3.

If the difference between the sums of alternating sets digits in a number is divisible by 11, then the number itself is divisible by 11.

That’s all I can remember, but yay for math right?

[–] [email protected] 8 points 3 days ago (2 children)

Well, on the side of easy ones there is "if the last digit is divisible by 2, whole number is divisible by 2". Also works for 5. And if you take last 2 digits, it works for 4. And the legendary "if it ends with 0, it's divisible by 10".

[–] [email protected] 9 points 3 days ago* (last edited 3 days ago) (1 children)

There’s also the classic “no three positive integers a, b, and c to satisfy a**n + b**n = c**n for values of n greater than 2“ trick but my proof is too large to fit in this comment.

[–] [email protected] 2 points 3 days ago

Fucking lol

[–] [email protected] 3 points 3 days ago (1 children)

Its never divisible by zero, and its always divisible by one

[–] [email protected] 3 points 3 days ago (1 children)

Never say never. 1/0 = 0

[–] [email protected] 1 points 3 days ago

Interesting read. Thank you.

[–] [email protected] 1 points 3 days ago

The 9 rule works for 3 too The 6 rule is if (divisible by 3 and divisible by 2)