/r/theydidthemath

Photograph via snooOG

And they said math has no real world applications

Submission Rules

  1. Proper title tags are required for all posts or it will be removed! The tags accepted are at the end of the sidebar down there.

  2. State clearly what is being or what you want calculated in the title. [Request] posts must have a calculable answer; otherwise, they will be removed.

  3. Give credit where credit is due—include the user who made the calculations in any post you submit: ex. "[RDTM] /u/FragTheWhale calculates...".

  4. For easy and quick math results (ex. How many feet are in a mile?) use Wolfram|Alpha™. Posts containing "simple math" will be removed, as well as requests whose answers are easily searchable online, and any other post at the moderators' discretion. For more abstract math, try /r/math or /r/learnmath.

  5. Posts which seem to be asking for help on homework will be removed. Try /r/homeworkhelp or /r/cheatatmathhomework instead.

Comment Rules

  1. This subreddit has a zero-tolerance policy for hateful or unnecessary language. There is no warning for hate speech of any kind. Rule breaking posts/comments will have a temporary ban that will serve as a first offense "warning". Repeat or egregious offenders will be banned permanently. Reddit's site-wide rules still apply here. Also, don't be a dick.

  2. Do not submit top-level comments in [Request] posts that are not an attempt at an answer or a request for clarification. Jokes or off-topic top-level comments will be removed.

  3. When answering [Request] posts, please cite reputable sources to defend any evidence that cannot be proven using your own math.

Report any spam/rule breaking posts to the mods with the report button. Be sure to include the reason for your report!


LaTeX and subscripts/superscripts

[; e^{\pi i} + 1 = 0 ;]

Superscripts and subscripts are supported in this subreddit, and LaTeX is used here as well. If the above equation looks like garbled code, or for information on how to display subscripts and superscripts, check our wiki page.


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TAGS!

We require title tags. Here are the tags we accept and what they are for. Please keep them at the start of your post.

  • [Request] - Asking the /r/theydidthemath community to do the math for you!

  • [Self] - You did the math and want to share it!

  • [RDTM] - "Reddit Did The Math", linking to a comment or post on Reddit where someone else does the math!

  • [Off-Site] - Use when linking to any site, including Imgur, that is not reddit.com.

  • [Meta] - Non-math posts regarding the subreddit itself. Don't use this unless you really have to.


Sidebar image from Randall Monroe's xkcd

  1. Browse by tag ▸
  2. Request
  3. Non-Request
  4. Self
  5. RDTM
  6. Off-Site

/r/theydidthemath

1,604,511 Subscribers

5

[Request]if you got all the water in all the oceans, turned it into 2 equal sized cubes, then teleported it into space, with one cube inside earths shadow and one cube outside earths shadow, how long would it take for each cube to freeze?

(did i use too many commas? i feel like i use too many commas too much)

3 Comments
2024/12/01
03:22 UTC

2

[Request] What is the mathematically average ammount of fingers on both hands

things like polydactyly exist that would bring it up but also Oligodactyly people. i want a average rounded to 3 decimals

4 Comments
2024/12/01
03:01 UTC

1

[Request] Which is more common in Pokemon legends Arceus? Two outbreaks, 1. Shiny rotom 2nd. Alpha oshawott (not shiny) which one should I go for?

1 Comment
2024/12/01
02:56 UTC

0

[REQUEST] Assuming Santa started his night just west of the International Date Line, how fast would he have to go to visit everyone

2 Comments
2024/12/01
02:55 UTC

412

[Request] How much faster would this be?

70 Comments
2024/12/01
00:57 UTC

0

[Request] Thrust calculation/Aviation Math. How much thrust would be needed for this to work?

https://preview.redd.it/6xbbhg7fa44e1.png?width=2560&format=png&auto=webp&s=347c2e7f22ee79b9bfa634ddd453ca3bd9183af1

https://preview.redd.it/bu1xbslla44e1.png?width=2560&format=png&auto=webp&s=e08a52f5e61ab2dae5589117a31fd4c47e5e3442

I'm playing this game called sable and you use these bike things to go around the desert, I know ground effect is a thing and that those wings probably aren't the right shape but assuming the wings are the right shape how much thrust would be needed to cause lift on something like this?

2 Comments
2024/11/30
22:46 UTC

0

[Request] How many tissues will it take to soak up the Atlantic Ocean?

1 Comment
2024/11/30
22:39 UTC

2

[REQUEST] How much time of uninterrupted scrolling would take to get this?

2 Comments
2024/11/30
19:11 UTC

0

[Request] I don't get it, please help me on my feeble mind understanding this meme

16 Comments
2024/11/30
18:58 UTC

765

[REQUEST] how strong does the light has to be to cause this?

12 Comments
2024/11/30
18:43 UTC

1

[request] A juice company brags that its concentrated Applejuice is better for the environment

So the argument is less CO2 emissions since less weight being transported. But what about the emissions from boiling away the water?

4 Comments
2024/11/30
18:40 UTC

0

[Request] How accurate is this, considering the holes that are not visible to the shot?

3 Comments
2024/11/30
17:11 UTC

0

[Request] What are the odds for someone to draw an Exodia right at first turn?

27 Comments
2024/11/30
17:06 UTC

1,776

[Request] How many times has the average 31-year-old wiped their butt?

I got this text from my friend this morning. He’s 31 years old. Here’s what I’ve thought to take into account so far:

  • years spent in a diaper
  • average poops per day
  • average wipes per poop

Outside of that, I haven’t come up with any more factors to consider.

153 Comments
2024/11/30
16:19 UTC

1

[Request] for help medical condition odds.

Request for help medical condition odds.

Not sure if I am in the right place. If not I would be grateful for some advice on where to go.

I need help figuring out the odds of developing a medical condition based on sex and race with no history of the condition. Aka spontaneous mutation.

If I am allowed to edit this post I will put the 3 cases here. If not I will make a second post. This is for personal needs, not homework or anything. They are all rare so I am having trouble doing the math. Thanks.

4 Comments
2024/11/30
15:16 UTC

114

[request] Friend said jokingly “I’m this years old, have fun.”

21 Comments
2024/11/30
14:54 UTC

69

[Request] What actually is the boiling point of a dog?

14 Comments
2024/11/30
14:43 UTC

243

[Request] How many hot dogs per minute do they sell?

28 Comments
2024/11/30
14:41 UTC

0

[Request] What temperature would it actually need to be to feasibly cook the turkey in 1 second?

(Apologies for bad quality.)

10 Comments
2024/11/30
14:30 UTC

25,207

[Request] What would happen to the turkey if you did this?

(Apologies for bad quality.)

567 Comments
2024/11/30
14:06 UTC

0

[Request] - what is the mass of everyone on Earth's blackheads?

what is the mass of everyone's blackheads and also the volume of possible?

1 Comment
2024/11/30
12:37 UTC

1

[Request] if I roll an 8 sided die four times, what are the odds of it landing on the same face twice?

Also, what are the odds for if I roll 8 times?

Sorry if this is too simple but I couldn't get a clear answer online.

9 Comments
2024/11/30
12:36 UTC

0

[Request] How many years will it take to create a baby that is mixed with all ethnicities? (more details in the comments)

7 Comments
2024/11/30
12:19 UTC

0

[Request] how many sweets are in this jar

7 Comments
2024/11/30
10:56 UTC

0

[Request] How to get maximum pie for minimum money

12 Comments
2024/11/30
10:18 UTC

1

[Off-Site] would still be hungry after eating 335 big macs

0 Comments
2024/11/30
10:17 UTC

122

[Request] How many calories would this be on average?

9 Comments
2024/11/30
10:09 UTC

313

[Request] In reality would this trap have killed Marv or at least done permanent damage?

72 Comments
2024/11/30
07:54 UTC

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