/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

1,597,955 Subscribers

1

[Request] What's the probability that the three dice he dropped with his left hand show the same set of faces up as the three he dropped with his right hand?

1 Comment
2024/11/22
22:13 UTC

1

[Request] If E=mc², how much mass would we need to fuel humanity's energy needs for the past decade?

Einstein's equation E=mc^(2) tells us that even a tiny amount of mass contains an astonishing amount of energy.

So, let's imagine we had a perfect way to convert mass directly into usable energy. How much mass would it take to power all of humanity's energy consumption over the last 10 years?

2 Comments
2024/11/22
21:54 UTC

3

[Request] Please help me figure out a budget for groceries for my unhoused clients

If I have a 100 dollar budget a week for three people I'm helping who live without access to a microwave, hot plate, or refrigeration

What's the best way to get to around 2400 calories a day without causing bone crushing depression from repeating the same thing?

Is it even possible?

They live in an extended stay hotel and are homeless. The key issue is that the foods that are nutritious AND calorie dense are not stable at room temps.

They also currently work three different gigs so the food has to travel and can't just be overnight oats soaked in water in a big tub.

I'm gonna have more clients like this with the budget cuts my org is expecting to hit our entire social services network in America.

I'm just wanting help on how to keep people healthy without just giving them tuna sandwiches to eat all day everyday without variety.

That would be my 13th reason.

I can't do anything to compensate you but let you know you would be helping me help societies most vulnerable people. I can put your name on my grant paperwork I have to submit each month if you want. I guess I can do that.

They live in a food desert but I have publix/Kroger/Walmart/Safeway kinda options to shop from.

There are other things I will be doing to supplement this including my own income and from food banks and the like. I'm gonna be buying three microwaves with my own money once I get paid, since apparently it's against state and federal law to buy them one with grant money that's for mental health related case management.

6 Comments
2024/11/22
21:26 UTC

3

[REQUEST] How big would this make the christ the redeemer statue if he was to scale in this shitpost from r/mapporncirclejerk?

5 Comments
2024/11/22
21:19 UTC

0

[request] what were the odds of this URL happening

So I uploaded a speedrun and the first thing in the URL Is 'urG0D'. How rare is it?

3 Comments
2024/11/22
21:17 UTC

229

[Request] to the extent of a post yesterday; how many decibels do you need to kill it?

47 Comments
2024/11/22
20:58 UTC

0

[request] What is the hottest temp something can be?

Like absolute zero is the lowest temp, what is the highest temp, if there is a limit?

6 Comments
2024/11/22
19:20 UTC

192

[REQUEST] What would be the most accurate version of this meme? Tried googling but I just gave up.

13 Comments
2024/11/22
18:49 UTC

24

[REQUEST] Is this true, lol? Is it even possible to count?

4 Comments
2024/11/22
18:45 UTC

0

[REQUEST] Can anyone tell me the height of Camp Randall Stadium from the highest seat to the ground?

Hi all, went to wisco badger game at Camp Randall Stadium. We had the tip top seats in the NW corner. The only thing that kept us warm between plays was a healthy debate on how high up we where.

I have looked online a fair bit and also asked their sub and don't have any answers.

If anyone is really bored and wants to help me figure it out that would be great. I have a beer bet on it. There is also a part 2 to this question FYI.

Thanks

1 Comment
2024/11/22
18:31 UTC

69

[Request] What are the chances to get this particular license plate?

8 Comments
2024/11/22
17:45 UTC

668

[Request] What is the probability that no one is blinking in this photo?

113 Comments
2024/11/22
16:58 UTC

1

[Request] I've always wondered how big the Memory Dump is in Inside Out. How big is it?

4 Comments
2024/11/22
16:22 UTC

2

[REQUEST] Odds of getting a day off approved.

My office has a policy of only 2 team members using PTO on any given day. We have 16 members and 10 PTO days for each.

We just acquired an additional 13 members, but the policy has remained the same.

What are the odds, assuming all non federal holidays are removed from work days and all remaining workdays are equally desirable, that someone wouldn’t be able to take a day off (bc 2 others already requested it) in the 16 person team vs the 29 person team?

5 Comments
2024/11/22
16:10 UTC

31

[Request] How many bananas would you have to eat before each banana reaches lethal levels of radioactivity?

16 Comments
2024/11/22
15:47 UTC

244

[Request] How much power would you get from each plug and what could you actually plug in?

67 Comments
2024/11/22
14:49 UTC

0

[REQUEST] was that plane real

5 Comments
2024/11/22
14:41 UTC

1,362

[Request] Is this the optimal way to maximize the amount of tictacs packed into the box?

103 Comments
2024/11/22
13:39 UTC

6

[Request] Would the length of hemp rope it took to drop a rock 4m in diameter, and density approximately 3000kg/m^3 be buoyant enough to eventually stop the rock-anchor's decent to the bottom of the Mariana's Trench?

4 Comments
2024/11/22
13:35 UTC

0

[Request] What's the likelihood of her being pregnant?

5 Comments
2024/11/22
12:49 UTC

0

[Request] Is it really "cheating" ?

What if the weight of the athlete reamains the same and her height changed?

What would be the equivalent weight to lift for someone who weighed twice the weight of the athlete?

And finally, What is mathematically the best size to deadlift?

13 Comments
2024/11/22
12:28 UTC

0

[request] Are there more cuboid or sphere shapes on Earth?

Cuboid could include bricks, books, cupboards. Sphere could include balls, orbeez or bubbles

40 Comments
2024/11/22
11:39 UTC

36

[Request] what are the odds of playing a perfect game of Yahtzee AND does the likelihood increase with number of games played?

I am essentially wondering if it is feasible to play a perfect game and then if the Monty Hall problem can somehow be applied.

30 Comments
2024/11/22
09:32 UTC

1

[REQUEST] would the particles from Hitler's cremation really spread that far?

10 Comments
2024/11/22
08:38 UTC

0

[Request] Are bricks heavier than feathers?

I keep seeing this question being asked, but never saw anyone try to do the math!

Which is heavier: £100 of bricks or £100 of feathers? Assume either the cheapest or average costs of each.

(I'm aware this may come off as a joke, but I am genuinely curious as to the relative value by weight of each)

10 Comments
2024/11/22
08:33 UTC

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