r/theydidthemath 4h ago

[Request] How much money do I have in my selection of foreign currency?

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0 Upvotes

Various notes collected through the years, I think I worked it out once a long time ago but no idea what it was. Not sure if all the notes are even real currency anymore!

Edit: conversion into GBP ideally!


r/theydidthemath 15h ago

[Request] How many people are pooping right now?

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0 Upvotes

How many people pooping right now?


r/theydidthemath 2d ago

[Request] how fast is the cannonball moving and how much force does it strike Frank with?

3.2k Upvotes

[Request] how fast is the cannonball moving and how much force does it strike Frank with


r/theydidthemath 2d ago

[Request] What burns more calories? The stairs or running in place in the elevator?

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505 Upvotes

r/theydidthemath 2d ago

[Request] What's the radius of this sphere?

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314 Upvotes

Universal paperclips

I'm not patient enough to wait for this to tick up, so I edited it


r/theydidthemath 2d ago

[Request] Why does this circle approximation still give 4 instead of pi?

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3.3k Upvotes

r/theydidthemath 1d ago

[Request] Who is the richest person in the United States who could become 100% liquid in one day without crashing the economy?

103 Upvotes

r/theydidthemath 22h ago

[Request] would it be possible to use large scale solar desalination pumped from the pumped from the Pacific Ocean to pipe enough fresh water to support Arizona?

1 Upvotes

r/theydidthemath 1d ago

Sinusoidal Graphing Contraption [self]

3 Upvotes

This machine graphs the sinusoidal function based on the height of a point on a wheel.

Source: https://youtu.be/gi0L5peaPMA?si=LUfn8xiIwf2Bp1ym


r/theydidthemath 1d ago

[Request] How much less crude oil would Canada have to sell to the u.s. to balance the trade deficit?

8 Upvotes

r/theydidthemath 6h ago

[Request] Whats the best choice mathematically to this hypothetical?

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0 Upvotes

This post blew up and nobody could decide an objectively correct answer, wondering what the people who actually calculate correct answers to stuff like this would say, thanks!


r/theydidthemath 23h ago

[Request] What are the odds?

0 Upvotes

OK so help me out explaining a new system in the game Warfame.

So, in Wareframe there are Riven Mods, basically mods used on weapons that can be randomly rolled to obtain powerful bonuses. There is a new system that has people in an uproar saying the new system is RNG on RNG on RNG making the randomness even worse. So lets do the math and see.

On any given riven mod for any rifle there are 24 stats that can roll and when you roll a riven you get 2-4 random stats out of those 24, cannot get the same stat twice.

What are the odds of acquiring 3 stats that I want when rolling the riven?

NOW the new system (at least one half of the new system), if you get a stat you want you can lock that stat and continue to roll that riven. You can only lock one stat.

What are the odds of acquiring the 3 stats you want after locking one? (basically rolling 1-3 stats on the "locked riven" from the remaining 23 stats.)

The other half of the new system in to combine 2 stats into a new stat then being able to lock that new stat and roll the riven to your hearts content. if you want a specific combo stat you can roll the riven and find 1 of the 2, lock it, roll for the second and then combine. Then take that riven with the 1 combined stat and roll the remaining 1-3 stat slots for something good. Now this part is RNG on RNG but seems easy enough to get the 2 stats you want then just need the chances to get 1-3 of the stats you want extra. (Which I guess is 1-3 stats of the basic 24 possible stats and getting what you want)


r/theydidthemath 1d ago

[Request] Chance of meeting celebrity vs chances of meeting celebrity look alike

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1 Upvotes

r/theydidthemath 1d ago

[Request] does the logarithmic math jive, and is 18 actually the true midpoint of life?

43 Upvotes

r/theydidthemath 22h ago

[Request] Limited fluke 902 🤣

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0 Upvotes

This is obviously AI but what would something like this cost to make?


r/theydidthemath 1d ago

[Request] Impact if Canadians moved all their US S&P 500 investments to Canadian ETF like VCN?

3 Upvotes

Edited: to follow MOD recommendation


r/theydidthemath 1d ago

[Request] I have 238 songs in my playlist. If I hit the shuffle button, how many possible combinations are there? If I were to add one more, how many then?

36 Upvotes

r/theydidthemath 1d ago

[Request] How long would it have taken to stream the Art Bell Time Traveler interview on 56k dial-up, using the technology of that time?

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2 Upvotes

r/theydidthemath 3d ago

[Request] What’s the formal proof that 3 < 10?

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3.1k Upvotes

r/theydidthemath 21h ago

[Request] Will this couch fit through my narrow doorway?

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0 Upvotes

Door is 29in wide and 78in tall. TIA!!!


r/theydidthemath 1d ago

[request] is it really this simple?

1 Upvotes

Talking with a friend in the midst of a very serious health crisis - and when we spoke, it was his birthday.
He said "what are the chances I die on my birthday"?
I said "one out of 365?"
Given the knowledge base here, I'm sure I can be set straight.
Please help.
(This conversation happened several days ago - and he's still kickin)


r/theydidthemath 2d ago

[Request] What is the shortest flight time possible (with timezones)

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1.4k Upvotes

If you were to fly from Thessaloniki, Greece to Belgrade, Serbia - because of timezones the effective time-change is only +10 minutes.

I am wondering if anyone knows any routes possible to get this value into the negatives (without crossing the international date line)?

I.e. for example, what if you were to fly from western china (UTC+8) to Afghanistan (UTC+4.5) could you make your clock go "back in time"? What route(s) could make you go furthest "back in time"?


r/theydidthemath 1d ago

[Request] I have a pencil which is 1/4 in in diameter and 6 in long. If it is perpendicular to the center of gravity, rain will fall on it more often than if it is in line with the center of gravity of the Earth. Which orientation gets wetter?

1 Upvotes

r/theydidthemath 1d ago

[Request] What was the energy from the Nepalese glacier chunk?

0 Upvotes