You are viewing a single thread.
View all comments View context
8 points

There are tricks like that for a lot of numbers. For 7, chop off the last digit, double it and add it to what’s left. Repeat as required. If the result is divisible by 7 then the original number was. eg: 356 -> 35+12=47 not db7. 357 =>35+14 both db7 so we don’t even need to do the add.

permalink
report
parent
reply
5 points

Clever.

permalink
report
parent
reply
3 points

Girl.

permalink
report
parent
reply
3 points

double it and add it to subtract it from what’s left

permalink
report
parent
reply
1 point

14: 1 + 8 = 7. Not db7

permalink
report
parent
reply
3 points

You clearly mean:

14: 1 + 8 = 9 (not db 7)

Someone else in this thread correctly stated:

“Chop of last digit, double it and subtract from what is left”

14: 1 - 8 = -7. (dB 7!)

Math is awesome, I didn’t know this trick!

permalink
report
parent
reply
1 point

Yes, that’s what I meant. The subtract rule works.

permalink
report
parent
reply

Lemmy Shitpost

!lemmyshitpost@lemmy.world

Create post

Welcome to Lemmy Shitpost. Here you can shitpost to your hearts content.

Anything and everything goes. Memes, Jokes, Vents and Banter. Though we still have to comply with lemmy.world instance rules. So behave!


Rules:

1. Be Respectful

Refrain from using harmful language pertaining to a protected characteristic: e.g. race, gender, sexuality, disability or religion.

Refrain from being argumentative when responding or commenting to posts/replies. Personal attacks are not welcome here.


2. No Illegal Content

Content that violates the law. Any post/comment found to be in breach of common law will be removed and given to the authorities if required.

That means:

-No promoting violence/threats against any individuals

-No CSA content or Revenge Porn

-No sharing private/personal information (Doxxing)


3. No Spam

Posting the same post, no matter the intent is against the rules.

-If you have posted content, please refrain from re-posting said content within this community.

-Do not spam posts with intent to harass, annoy, bully, advertise, scam or harm this community.

-No posting Scams/Advertisements/Phishing Links/IP Grabbers

-No Bots, Bots will be banned from the community.


4. No Porn/Explicit

Content


-Do not post explicit content. Lemmy.World is not the instance for NSFW content.

-Do not post Gore or Shock Content.


5. No Enciting Harassment,

Brigading, Doxxing or Witch Hunts


-Do not Brigade other Communities

-No calls to action against other communities/users within Lemmy or outside of Lemmy.

-No Witch Hunts against users/communities.

-No content that harasses members within or outside of the community.


6. NSFW should be behind NSFW tags.

-Content that is NSFW should be behind NSFW tags.

-Content that might be distressing should be kept behind NSFW tags.

If you see content that is a breach of the rules, please flag and report the comment and a moderator will take action where they can.


Also check out:

Partnered Communities:

1.Memes

2.Lemmy Review

3.Mildly Infuriating

4.Lemmy Be Wholesome

5.No Stupid Questions

6.You Should Know

7.Comedy Heaven

8.Credible Defense

9.Ten Forward

10.LinuxMemes (Linux themed memes)


Reach out to

All communities included on the sidebar are to be made in compliance with the instance rules. Striker

Community stats

  • 14K

    Monthly active users

  • 9.8K

    Posts

  • 220K

    Comments