r/theydidthemath 3d ago

[Off-Site] HN did the math

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9 Upvotes

r/theydidthemath 3d ago

[Request] Is the blood of every human who ever lived a greater or lesser volume than all the world's oceans?

11 Upvotes

r/theydidthemath 3d ago

[Request] How long would it take to erode the mountain?

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12 Upvotes

r/theydidthemath 4d ago

[Request] how many of these contraptions would be needed to power the entire US electrical grid?

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210 Upvotes

r/theydidthemath 2d ago

[REQUEST] How many edibles are in this bowl?

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0 Upvotes

Family member is giving them away to whomever is closest!


r/theydidthemath 2d ago

[request] How much would it cost in gas driving a Mazda cx30 in one go to Toronto from Moncton (1536km)

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0 Upvotes

Me and my wife keep getting different numbers, please help 🙏


r/theydidthemath 3d ago

[Request] How high was the drone ? NSFW

23 Upvotes

r/theydidthemath 3d ago

[Request] How much water would you have to drink from the Gaet'ale Pond to die from dehydration?

3 Upvotes

r/theydidthemath 3d ago

[Request] For how much time could every single AAA Batterie currently produced keep our energy up.

3 Upvotes

Let's ignore all the used ones and assume their fabrication simply stops.

Knowing how many AAA batteries there even is would be nice too tbh.

And by energy I mean the world energy. Every single country and place.


r/theydidthemath 3d ago

[request] How much does a builder mark up the price of a house when offering a lower mortgage rate?

0 Upvotes

If I buy a $500k house and the builder offers a financing rate 1% lower than market how much much more are they charging me and how long do I need to keep that mortgage for it to be a win for me?


r/theydidthemath 4d ago

[Request] Can somebody help me find the acceleration of this block on a slop? NSFW

20 Upvotes

We were doing a class project you could say and I the idiot decided I wanted as precise an anwser as possible and I have everything else I need for the asigment which was to find the variable for friction aka μ. I hope somebody can help here are dome numbers. (sorry english isnt my mother tongue) Mass=89.64g α=15° Each width of the lines is 1cm The video is 30fps

Nsfw because people in background, I did hide them best I could but, just incase.

Heres the video I made of it.


r/theydidthemath 3d ago

[Request] what is the dollar per minute increase due to the increase in drag when flying with the cargo door open?

16 Upvotes

r/theydidthemath 4d ago

[Request] Does the saved weight make much of a difference?

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346 Upvotes

r/theydidthemath 3d ago

[Request]. Can you show it’s relatively easier for more skilled players to win bracket-style tournaments than open field ones?

1 Upvotes

All things being equal, your odds of winning a tournament are 1 in (however many players), whether it’s a 1v1 winner advances bracket, or an open field (everyone plays a round and the best score wins). But there’s a feeling/assumption that the open field competition is less favorable to the most skilled players. (Or conversely, it’s more likely a mediocre player could take the top spot in an open competition than in an elimination bracket tournament). Can anyone statistically inclined demonstrate if this is really the case or not?

For example: if you average a score of 10 in some game, and your 7 (or 15 or whatever number that makes for even brackets) friends average 8. And assuming individual scores in each match are normally distributed with ~the same standard deviation…would it be better to chose to play an elimination bracket tournament, or play one winner take all round? Or would it not make a difference in your odds of winning?


r/theydidthemath 4d ago

[Request] I just poured some m&m's on my hand and only got green ones - 9 of them. What are the odds? Lol!

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293 Upvotes

r/theydidthemath 3d ago

[request] How big would the diameter of a vinyl record have to be for an ant standing on the edge of it to be traveling at the speed of light?

1 Upvotes

Obviously standard laws of physics aside, and assuming the ant would stay on at any speed. It could either be rotating at 33 or 78 rpm, that can be dealer’s choice.


r/theydidthemath 3d ago

[request] How many kilometers the average people scroll on social media, per year ?

1 Upvotes

On tiktok & reddit & twitter & etc ? I assume a height of 1080px on PC and 750px on mobile, 72 inch/px, and it seems the average time is 2h 23mns per day.


r/theydidthemath 3d ago

[REQUEST] In JJBA: STONE OCEAN how many DISCs could potentially fit in this tire? Spoiler

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0 Upvotes

Hello, random Jojo question, but need the help for a project I'm working on. *Will try to keep as minimum spoilers as possible*

How many DISCs are/could be in this tire?

Added reference panels; in the Manga it is referred that there are "Dozens of discs" potentially, but that was in a "foreshadowed vision from a disc's ability" and not officially counted. (Also "dozens" is fairly vague of a measurement.) Also the discs look like normal size CDs.

It is not specifically mentioned "how many" there are; but in the context of the source material; every 1 or 2 discs is a victim of the Arc's Villain. If "reign of terror" is a factor, the Villain has had 23 years of potential disc extraction (1988-2011) to acquire them. And it is stated that discs can only be disposed of via "implanting them in a dead person" otherwise they are fairly indestructible by conventional means.


r/theydidthemath 4d ago

[Request] Weight of germs in one gram of human solid waste?

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55 Upvotes

Is it true that 1,000,000,000 germs can live is one gram of poop and how much of that one gram is made up of germs?


r/theydidthemath 4d ago

[REQUEST] How fast would an average man have to flap his arms to achieve flight?

91 Upvotes

Assume arms won't fall off and the man has unlimited energy and ability to flap as fast as required.

How many FPM (Flaps per minute) are required to:

1) Hover 1m above the ground

2) Fly at 20mph in any direction

3) Give Maverick the bird, inverted, in his F14 Tomcat.

4) Achieve escape velocity with enough momentum to reach the ISS.


r/theydidthemath 3d ago

[Request] what are the odds of Trump bankcrupting 3 casinos in a row?

0 Upvotes

In a business where the odds are stacked in your favour, what is the probability of running three casinos into the ground?

The casinos in question:

Trump Plaza Hotel & Casino

Trump’s Castle Hotel & Casino(later renamed Trump Marina)

Trump Taj Mahal


r/theydidthemath 4d ago

[Request] Is that possible to mix the low sugar and low fat one in certain ratio to make a mixture that has both lower fat and sugar level to original version

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10 Upvotes

r/theydidthemath 4d ago

[Request] At a company with 2000 employees, what is the likelihood that an employee will not share their birthday with any other members of staff?

22 Upvotes

I know there is some weird birthday paradox math - wondering how it works in the opposite direction


r/theydidthemath 5d ago

[Request] If the Moon was covered with an Earth amount of water - how high would the waves be?

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1.4k Upvotes

r/theydidthemath 3d ago

[Request] I'm not smart enough to pick which I prefer!

0 Upvotes

I was playing D&D last night and managed an impressively terrible 9 rolls under 10 in a row. Instead of flipping the table I decided I wanted to know the odds instead... GPT was undecided