r/theydidthemath 5h ago

[request] Did they do this correct.

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321 Upvotes

r/theydidthemath 23h ago

[REQUEST] Can someone actually tell me if this is the correct answer

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5.4k Upvotes

r/theydidthemath 1d ago

[Request] He says an anvil weighs about 100 lbs and the black powder will cause it to fly up until gravity overtakes it. How much back powder would be needed for escape velocity do earth's gravity never overtakes it again?

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987 Upvotes

r/theydidthemath 4h ago

[RDTM] Guess I'm in the 00.01 Percentile

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10 Upvotes

r/theydidthemath 1d ago Wholesome

[REQUEST] Are there more eyes in the world or legs?

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4.3k Upvotes

r/theydidthemath 4h ago

[request] in the lightning thief percy Jackson jumped from the gateway arch to the nearby river. That’s a 200 meter jump, or over 600 feet. I’m just wondering how much force is needed to do that?

2 Upvotes

Keep in mind percy was twelve so he was pretty light. And pretty short, he later did a similar feat in house of hades, but it didn’t have a clear distance.


r/theydidthemath 4h ago

[request] How heavy is air really?

2 Upvotes

My fella and I are having a disagreement. He asked me what I thought would happen if we had a hole that went all the way through the earth and jumped in it. (Assume that it doesn't get particularly hot down there because you burn up and die isn't a fun mental exercise)

So I told him that I think you would fall to the middle and get stuck there, but the air above you would be so so heavy and the air in the other above would be so so heavy that you'd get smooshed flat like a pancake.

He says he's pretty sure I'm wrong but he doesn't know why. So can anybody that understands gravity and air pressure better please break this stalemate? It's fun to argue when you don't know what you're talking about, but it's difficult to decide who's winning.


r/theydidthemath 6h ago

[REQUEST] By the numbers (if possible) Lives helped Vs. Lives killed due to major world religions. I know this is a tad abstract and hard to quantify. A lot of variables. I'm insanely curious though...

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4 Upvotes

r/theydidthemath 1h ago

[Request] How much led would it take to stop a cubic meter neutrino beam composed of 10^60 Neutrinos?

Upvotes

r/theydidthemath 2h ago

[OFF-SITE] Discord user calculates distance traveled in a video game (Uncharted 4)

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1 Upvotes

r/theydidthemath 2h ago

[Request] Approximately how heavy is May's anchor from the Guilty Gear fighting series?

1 Upvotes

r/theydidthemath 4h ago

[Request] What would the world population be today if no one died in any of the wars since, oh, say 1800?

0 Upvotes

r/theydidthemath 15h ago

[Request] So I was watching a video on calculus and when working with limits, as x = 2, he devides by x-2, but as that’s zero wouldn’t you not be able to divide by that, or else it would just be u defined?

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7 Upvotes

r/theydidthemath 9h ago

[request] new to this sub so I’m not sure if it’s a valid question but how many pieces of candy (nerds are not counted) are in this jar.

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2 Upvotes

r/theydidthemath 14h ago

[Request] How much money would Lester have made including all heists done by online players?

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3 Upvotes

r/theydidthemath 11h ago

[Off-Site] Maths for Computer Science - Primer Course

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2 Upvotes

r/theydidthemath 8h ago

[request] We know cars are measured in horsepower... and that energy can't be created or destroyed; only changed... therefore what is horsepower in gerbils? I.E. how many gerbilpower to the horsepower?

0 Upvotes

r/theydidthemath 13h ago

[REQUEST] Dice roll probabilities

2 Upvotes

I'm trying to calculate the probability of a success on at least 2 out of 4 rolls of d20 dice, with a success being a roll of 11 or higher.

Catch is, first roll gets a +1 to its result (so a success is 10-20 on the die), second gets +2 (9-20), and third gets +3 (8-20). The fourth one has no modifiers.

But I suck at math and barely passed my high school finals. I tried googling probability tutorials but I got stumped. So I'm hoping one of you can help; what are the chances that 2 or more out of the 4 dice get an 11 or higher on the result, after the modifier? Thanks!


r/theydidthemath 10h ago

[REQUEST] How much energy would a gym produce when all weights lifted are used to produce power.

1 Upvotes

r/theydidthemath 11h ago

[Request] If the earth were to stop spinning, how far would inertia launch you?

1 Upvotes

This is assuming you are on an infinitely flat plain. bonus points if you can figure out the closest possible distance a wall could be without killing you


r/theydidthemath 11h ago

[REQUEST] Height of a diving board to do a perfect flip.

0 Upvotes

Me and my friends discussed this today, since we were at a beach with diving boards. How high would a diving board have to be to enable a (hypothetical, perfectly stiff) person leaning towards the water to do a flip and land perfectly in the water? Let’s assume this person is me (194cm) since I imagine height plays a part in the equation.


r/theydidthemath 21h ago

[Request] Got this hand dealt to me in tycoon. What are the odds???

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3 Upvotes

r/theydidthemath 14h ago

[REQUEST] How many trees do I (roughly) have to plant to offset MY average carbon emission if i live 100 year?

1 Upvotes

assuming i am an average German citizen (or EU/US if the data is easier to find) Assuming trees grow instantly, they get planted on my birth and they life for exactly 100 years


r/theydidthemath 16h ago

[Request] If a black carpenter ant was the size of a car, how much would it weigh? I tried scaling it by length and only got .5lbs.

1 Upvotes

r/theydidthemath 1d ago

[Request] how fast would I have to throw a teddy bear to Break a car‘s back windshield

11 Upvotes