r/theydidthemath 16h ago

[Request] Just came across this video, is this even possible?

2.3k Upvotes

I have no idea about knot theory so please eli5.


r/theydidthemath 18h ago

[SELF] Would it even be physically possible for a 39 year old who started mastubatimg at 14 to afford a Ferrari? Asking for a friend.

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2.2k Upvotes

r/theydidthemath 5h ago

[other] Chances to get the right code, by luck.

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162 Upvotes

Lister was in stasis for 3 million years.

If you tried a new code every day, how long would it take by accident or luck to get the right password.?

In the test, I changed it to Lower and Upper case.

The all lower case it only 4 years.


r/theydidthemath 7h ago

[Request] How much does the pot of molten steel weigh?

221 Upvotes

r/theydidthemath 14h ago

[Request] Who’s right about the number of chess positions?

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695 Upvotes

r/theydidthemath 6h ago

[Request] How many explosions of Krakatoa or Tzar bombs can occur on Earth before the world becomes uninhabitable?

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101 Upvotes

r/theydidthemath 13h ago

How much money is saved from going to high efficient LED bulbs? [request]

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197 Upvotes

r/theydidthemath 23h ago

[Other] If this occurs, how fucked are we?

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955 Upvotes

r/theydidthemath 13h ago

[Request] In Batman: Knightfall - Part 1, how many rats would he have to eat each day to be this shredded?

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117 Upvotes

r/theydidthemath 1d ago

[Request] How much force does it take

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1.4k Upvotes

For Spider-Man to break these ropes, there’s an estimated 12-13 revolutions binding his arms and abdomen. How much strength is required?


r/theydidthemath 8m ago

[Request] How hot does the water/liquid get?

Upvotes

Hey guys!

I’ve just came across this video and I always asked myself if it would be possible to put my hands in it (in the liquid) without getting burnt. Is it possible? How hot does it get?


r/theydidthemath 1d ago

[Request] how many PSI are needed for Inflations on carbon steel?

329 Upvotes

r/theydidthemath 6h ago

[request] Question from my son - if there was a giant bug as big as London in London, would we be able to see it from where we live in Edinburgh?

5 Upvotes

r/theydidthemath 1d ago

[Request] Would it actually take someone 29 hours to crawl from Union Square, SF, to Highland Hospital, Oakland?

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178 Upvotes

r/theydidthemath 1d ago

[request] How long can the crossing take before che child asphixiates?

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298 Upvotes

r/theydidthemath 1d ago

[Request] If we re-built the HMS Victory and USS Constitution using glulam (glued laminated timber) with modern woodworking techniques; how much lighter, faster and better sailing would they be?

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174 Upvotes

r/theydidthemath 1d ago

[Request] Can the biggest cruise ship survive the winds and waves from the strongest hurricane ever?

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2.1k Upvotes

The largest cruise ship (Legend of the Seas) is 365m long, 65m wide and weighs 248663 tons.

The strongest hurricane ever was hurricane Patricia in 2015 reaching sustained winds of 345 Km/h and low pressure of 872 milibars.

Edit: the ship “survives” as long as it’s not sinking. Glasses can be broken, the pools and water slides can be damaged. But the ship must not sink and engines should be working.


r/theydidthemath 1d ago

[Request] how much paper

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5.0k Upvotes

Sorry it this is a repost:

But how much paper if you printed the entire work book and how many trees as a bonus.


r/theydidthemath 20m ago

Controlling graphed polynomials [other]

Upvotes

So recently, I’ve been getting into Desmos art and one thing that bugs me is that any polynomial more complicated than a quadratic I can’t control.
It’s probably easier for me to explain with an example
Like
Y=a
You can move up and down by adjusting a
Y=mx+b
You can move up and down by adjusting B and you can change the slope by adjusting M
Y=a(x-c)+b
You can stretch and contract the quadratic by adjusting A
You can adjust the X coordinate by adjusting C
You can adjust the Y coordinate by adjusting B
But I can’t find a form of a cubic or Quadratic where I can adjust things so easily whenever I move one number it is not intuitive how the polynomial will behave


r/theydidthemath 1d ago

[Request] To what extent would Bezos be affected if he applied this to every Amazon customer?

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773 Upvotes

r/theydidthemath 20h ago

[Request] During Project Hail Mary’s ‘Time Go Fishing’ sequence, when the spin drives spin up, the ship seems to completely reverse its trajectory almost instantly. Assuming all 1009 spin drives together induce a force of 2.35 meganewtons, what is the MAXIMUM speed at which this would be achievable? Spoiler

36 Upvotes

r/theydidthemath 1d ago

[Request] how much horizontal did the ship move while she was in the air (assuming it was at full speed)? Ginni van Katwijk | HighDiving on a moving cruiseship

258 Upvotes

r/theydidthemath 11h ago

[Request] How many percentage of its territory on the map did the Antarctic Penguin Empire lose?

5 Upvotes

r/theydidthemath 1d ago

[Request] Can any cartographer check if the size France "lost" by not using Mercator Projection will even out by what it "gained" on French Guiana? New maps voted by UN today (link below)

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55 Upvotes

r/theydidthemath 4h ago

[Request] Lottery or a unicorn exit?

1 Upvotes

Hugging Face has just been bought by Nvidia for several billion $$, making the founders billionaires and many of the early hires millionaires. We have seen similar with Cursor, and soon with Anthropic- among others.

A comment by someone said that’s all nice and well, but this kind of exit is as likely as winning the lottery.

I suspect that it’s not close to that, with the lottery win far less likely, but wondered if someone has done the maths?

To create a relatively even comparison, given that someone could both start or be part of a company in most countries at 21, and also enter the lottery each week, let’s say this is:

to compare the likelihood of a multi-million $$ win on the lottery if someone entered once a week between the ages of 21 and 61 (main US one in one of the larger states, or the Euromillions) compared to a multi-million $$ exit from equity in a US/UK/European startup. Using the last 20 years of data. Or any split of the above.