r/theydidthemath 1d ago

[Request] How far away could you see a space elevator from the Earth's surface?

0 Upvotes

As the title says.

Imagine you had some structure, like a tower or space elevator that extended into space, well beyond the atmosphere (ignoring the difficulties of creating such as structure).

If you were standing on the Earth's surface, and assuming relatively level terrain (we'll say approximately "at sea level"), how far away would you be able to be and still see at least a glimpse of this structure?

Bonus question (not really math, more optics/physics): What would the "top" of the tower look like at the point where you can no longer see it going up? Would it just kind of fade to a "vanishing point", have some clear cut-off, or basically fade as if someone put a transparent gradient at the top?

Thanks.


r/theydidthemath 1d ago

[Request] Would it be possible to calculate a rough estimate of the wattage of major supercomputers worldwide and how much they would heat the oceans if all off them were underwater?

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6 Upvotes

I'm talking about big servers like things used for chat got, YouTube, Facebook, crypto mining, etc.


r/theydidthemath 1d ago

[REQUEST] How long would it take to drive it back to Germany.. let’s say the center of Berlin using existing roadways from where it is today (Kubinka tank museum)

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5 Upvotes

r/theydidthemath 1d ago

[Request] Student aid anti-trust suit

1 Upvotes

People are speculating on the expected payments for a huge anti-trust suit against many schools, who colluded to cook the books on financial aid calculations.

So the question is. If there is 200M dollars available, and 200k POSSIBLE claimants, and the claim amount varies by the number of years attended for undergrad... what is the expected claim amount if every possible person submits a claim... for the classes of people who attended for 1, 2, 3, and 4 years of the relevant window.

I think it is a pretty interesting question.


r/theydidthemath 3d ago

[Request] Anybody knows what is the temperature of that thing?

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2.9k Upvotes

r/theydidthemath 1d ago

[Request]I thought that 12.75% of a dollar is $0.1275,but I'm not sure anymore,can someone check this please?

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0 Upvotes

r/theydidthemath 3d ago

[Request] is there a chance that this could happen, under the right circumstances? Is it even possible?

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4.5k Upvotes

r/theydidthemath 1d ago

[Request] what are the odds?

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0 Upvotes

r/theydidthemath 2d ago

[Request] Does anyone know if it would be possible to make something like the Octopod in real life?

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18 Upvotes

r/theydidthemath 1d ago

[Request] What number can be expressed as a 1 with some amount of zeroes behind it that is larger than just 1 in the most possible numerical bases?

0 Upvotes

r/theydidthemath 1d ago

[Off-Site] He just... dumped the math like that... | truckloads to fill a hole

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1 Upvotes

r/theydidthemath 2d ago

[Request] How much water did he use?

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190 Upvotes

r/theydidthemath 1d ago

[Request] How much would 12 French Francs from 1926 be worth in modern day Australian dollars?

1 Upvotes

I'm reading The Sun Also Rises, and its mentioned that the whiskey and soda the characters but from a bar costs 12 francs. Would that have been a lot of money? Not quite a straightforward currency conversion as both France and Australia use different currencies than they did when the book was written.


r/theydidthemath 1d ago

[Request] Could 650 million people have visited the Kumbh festival in 45 days ?

0 Upvotes

In the recently concluded Kumbh Festival in India in 2025 it was said that almost 650 million people visited one place (City of Prayagraj) in 45 days.

Now the people came to the river banks, did the rituals and went back. some people stayed 1 night at the place. Some people stayed for 2 nights whereas a lot of people just came in the day and did not stay and went back the same day. There were some people who came stayed in the car and did not book hotels or stayed in open grounds

Is it possible that 650 million people visited in for 45 days? Is it possible logistically for transport, stay to manage this crowd

some sources of the info

https://en.wikipedia.org/wiki/2025_Prayag_Maha_Kumbh_Mela

This video gives an idea of the temp tent area where people stay

https://www.youtube.com/watch?v=kcxShS71QyQ

There are almost 100K tents build

https://www.moneycontrol.com/news/india/68-lakh-wooden-poles-100-km-fabric-and-3000-workers-making-of-tent-city-in-maha-kumbh-12907258.html


r/theydidthemath 1d ago

[self] More basic GCSE foundational math | how to add fractions 🧐

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1 Upvotes

r/theydidthemath 1d ago

[REQUEST] How many FPM does Daredevil hear in the city? farts per minute.

0 Upvotes

Daredevil can hear a gun cock from blocks away.

Is he hearing hundreds of farts per minute all day long?


r/theydidthemath 1d ago

[Request] What is the longest one could drive without changing lanes?

1 Upvotes

A job I had awhile ago had a fun part of the commute. On the way home, once I merged onto the highway, if I got into a specific lane, I could follow that line for about 15 miles. It would merge me onto the interstate and drop me off on the right exit without ever changing lanes.

I took that route again tonight after a date night and my mind mused…what would be the longest stretch in the world where you could get into a lane and never change lanes?

Rules:

  • No circles (e.g. multiple times around a roundabout)
  • Assume no construction or lane blockages/closures
  • A lane must be separated by painted lines, either dashed or solid. If a road ends to a non-painted street, that lane ends.
  • A lane change requires driving over a dotted or straight line. If the lane exits to a different road, but it continues in a single lane without merging lanes, that is allowed.

r/theydidthemath 1d ago

[Request] How fast is "385 bald eagle-hours per NYC to London"?

0 Upvotes

i'm assuming that they meant the flight time between the cities but can't do thing myself cuz i'm buzy laughing my butt off


r/theydidthemath 3d ago

[RDTM] The math behind the tariffs

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12.1k Upvotes

r/theydidthemath 1d ago

Optimize Gimkit Upgrades[Request]

1 Upvotes

So: There's this trivia game called that we use in my German (second language) class, and to finish the game, you have to collect 50,000 in-game dollars. To get money, you answer simple trivia questions. At first, a question is worth 1 dollar. The next is worth 2, then 3, etc until you break your answer streak by either being wrong or buying an upgrade.

I wrote the function f(X) = B((X/2)(2(C) + (X-1)(D))) to represent the total number of dollars earned in a given streak, where X is equal to the number of questions answered in a given streak, C is the number of dollars the first question in a streak is worth, and D is the number of additional dollars you earn for each successive question answered correctly in a streak. The initial function before buying any upgrades is f₁(x) = (X/2)(2+(X-1)).

With enough money, you can buy 4 upgrades from each of 3 categories that can change the output of the function. One is a "Multiplier" (B) upgrade, which will increase the B value. Another is the "Money Per Question" (C) upgrade, which will increase the C value. The last is the "Streak Bonus" (D) upgrade, which increases the D value.

B costs $50 for 1.5, $300 for 2, 2,000 for 3, and 12,000 for 5. C costs $10 for 5, $100 for 50, $1,000 for 100, and $10,000 for 500. D costs $20 for 3, $200 for 10, $2,000 for 50, and $20,000 for 250 Note that you do not have to buy the cheaper upgrades before the others, and they do not stack. The streak ends every time you buy an upgrade, but this only resets the streak bonus.

So, my question is: how can I optimize my purchase of upgrades in this silly little game so as to answer the least questions to earn $50,000, assuming I get none of them wrong?


r/theydidthemath 1d ago

69 kilograms of computer storage would weight around 8600000000000000000 terabytes. [Self]

0 Upvotes

The weight of each bit is just one electron and one electron weight around 9.1*10-31.

(69kg)/((9.110-31)kg/electron)=7.581031 electrons

This is also the number of bits, to convert to bytes. We just divide by 8 and get

9.481030 bytes or 7.8 million yottabytes(8.61018 terabytes).

This is just an approximation and I was being generous in the calculations, please correct me if i got something wrong, it is very possible since I am just a child and English is not my first language.


r/theydidthemath 1d ago

[Request] How many tennis balls are in this 1972(?) Volvo 145e?

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1 Upvotes

Presume that the car is filled to the brim of tennis balls.

Not sure exactly how helpful it may be, but the diameter for the tennis balls is somewhere between 2.575” and 2.7”. The dimensions of the car is 1.45m tall, 1.735m wide, and 4.64m deep. I don’t know the dimensions of the interior space. :-(


r/theydidthemath 2d ago

[Request] If I'm 99% sure that certain statement X is correct and my friend is 99% sure that I'm correct, is my friend 98% sure that the statement X is correct?

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66 Upvotes

If that keeps going, will there be a friend that is 1% sure that the statement is correct?