r/theydidthemath • • 10h ago

[Request] if the world is 700% richer than in 1970, does the math for the average person and the top 0.01% break down like this?

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603 Upvotes

Edit: To everyone who is doing the math, this is so cool and thank you. I am not a math person and wouldn’t even know how to start breaking this down or really understanding what considerations go into it.


r/theydidthemath • • 10h ago

[Request] How long would the sun need to stay turned off to remove the 1.5 degree over temperature from climate change?

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403 Upvotes

r/theydidthemath • • 14h ago

[Request] How fast would the rose have to be moving to blueshift this much?

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4.5k Upvotes

r/theydidthemath • • 1h ago

[Request] How much "weight" is Captain America pulling here?

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• Upvotes

I know "weight" is sort of the wrong metric here, but converted to kg, how much is Cap pulling here?


r/theydidthemath • • 8h ago

[Request] Slot machine randomness

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148 Upvotes

My wife and I recently went to our local casino and we played some of our favorite games. We were betting about the same time and ended up with the same exact board
Curious if this is something that happens often


r/theydidthemath • • 3h ago

[request] In terms of kinetic energy, what scale is the energy released from this? Gigajoules?Terajoules?

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25 Upvotes

r/theydidthemath • • 12h ago

[REQUEST] 60 year-old Mark Felix sets a new world record of 1:43.81 in the Hercules Hold, with Each pillar weighing 200 kg (441 lbs).

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79 Upvotes

Given that a portion of the weight is being held up by the ground, what weight and/or force is Mark Felix actually dealing with here? Do you take the weight of the column not directly over the base of column and that's it?

And maube less mathematics, does he have an advantage over others due to arm span etc? Or does the competition account for this?


r/theydidthemath • • 1d ago

[Request] How thick is the layer of lead paint at the Simpsons house?

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2.9k Upvotes

One of my favorite jokes from the golden years.


r/theydidthemath • • 1d ago

[Request] I've kept every Washington quarter (1932-1998) I've received in change for the last 9 months. I've got $81.75 so far. How long is it going to take for me to remove the rest from circulation?

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441 Upvotes

Second question: How lucky was I to get a 1964 silver quarter in my first 327 quarters?


r/theydidthemath • • 1d ago

[request] Can someone please explain this?

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628 Upvotes

r/theydidthemath • • 9h ago

[Request] Can someone verify whether this calculation is actually accurate?

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11 Upvotes

r/theydidthemath • • 1d ago

Could all of the worlds mosquitos fit inside an empty commercial plane? [request]

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20k Upvotes

r/theydidthemath • • 42m ago

[Request] How much money would be saved if every stop light intersection in the US was replaced with roundabouts?

• Upvotes

Materials, electricity, maintenance crews, nobody sitting at lights uselessly, etc. Is anyone else super annoyed with lights? I think it would be one of the next best things to apply AI tech to


r/theydidthemath • • 3h ago

[Request] Number of diet coke cans to make a functional chair out of.

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1 Upvotes

Listen I might have a slight diet coke addiction. Recently I've started collecting all the cans. I wonder how many (ish) I'd have to feasibly drink to melt them down into a chair.

For the record I'm about 6' and about 205 lbs. Bonus points if you have a chair design in mind.


r/theydidthemath • • 1d ago

[Other] How much weight can the ice floor support?

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205 Upvotes

The second part of the video,it seems to be about 1 m deep,how much weight can it support before it breaks?


r/theydidthemath • • 5h ago

[other] Genuinely interesting to think about

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2 Upvotes

r/theydidthemath • • 1d ago

[Request] How much (if even noticeable) would the sea level lower if every ship was dry docked?

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602 Upvotes

Are we talking sub 1mm or is there any non-negligible change that would occur?

I realise the oceans are colossal and ships comparatively microscopic, but there are tens of thousands of them and it made me wonder if anything would change at all.


r/theydidthemath • • 1h ago

[Request] How long does it take a can to reach equilibrium temp in a fridge?

• Upvotes

Curious how long it would take for a 12 oz aluminum can of liquid to reach an equilibrium temperature inside a normal, average fridge. Assuming a normal fridge, and obviously how much the fridge is opened during the time, but I’m only interested in the perfect scenario of it staying closed for however long it takes. I suppose if you want to go above and beyond then it would be cool to know how a single open of the fridge would affect that! I’d also be interested to know how much the math changes (assuming it does at all) depending on what the drink is, such as the difference between a soda, beer, or like a sparkling water.

(The can is starting at room temperature)


r/theydidthemath • • 1d ago

[Request] How much weight is this balcony actually holding?

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70 Upvotes

r/theydidthemath • • 1d ago

[Request] What could a T. rex actually crush with one bite?

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385 Upvotes

r/theydidthemath • • 4h ago

[Request] How fast would someone need to kick their feet and move their hands to generate enough lift to fly or hover?

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0 Upvotes

I’m wondering if it’s theoretically possible for a human to move their limbs in such a way and so fast that they can displace or propel enough air below them that makes their body levitate, sort of like a bird or dragonfly flapping their wings. Let’s just say this person is extremely durable and there’s no risk to tendon, ligament or nerve damage from moving so violently and I imagine it would be quite violent. I’m sure the size and weight of the person matters so just choose some numbers.


r/theydidthemath • • 11h ago

[Request] Is this math correct? (Probability of rare events in The Binding of Isaac, Video-Game)

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5 Upvotes

It was made with help from AI.


r/theydidthemath • • 1d ago

[Request] How long until the rubbing of sand destroy the name engraved on the gravestone?

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2.2k Upvotes

r/theydidthemath • • 6h ago

[Request] Star Trek: Teleporter vs Shuttles

0 Upvotes

Im watching Star Trek: TNG and clearly the benefits of teleportation are easy to enumerate, but they still sometimes take a shuttle. Im making two assumptions:

1) warp engines work on some version of alcubiere drives which are known to have immense energy requirements

2) the specific mechanism for creating/destroying matter is unknowable, but the amount of information is not (approx 7x10^27 atoms)

Just comparing those two actual elements, which would be more energy efficient - the warp drive or mapping/storing/transmitting all of that data inside of 5-10 seconds?


r/theydidthemath • • 7h ago

[Request] A longboarder hit 94 mph going downhill. If there were a ramp at the bottom, how high could he launch?

0 Upvotes

Saw this post about a downhill longboarder hitting 94 mph: https://www.reddit.com/r/longboarding/s/ZyF6DmaYCF

What if someone built a ramp at the bottom of that hill and he just kept going? How high could a person actually launch above the ground?

What kind of ramp would it have to be? I'm picturing something like a quarter pipe, but I've also seen those big straight wedge ramps, and ski jumps that curve and then go straight. Does the shape matter a lot at that speed, or is a ramp a ramp?

How big would it need to be? I assume if the curve is too tight he just gets flattened into the ramp.

How steep should the end be if you want max height? Straight up seems like the obvious answer but that also seems like a terrible idea.

How high would he actually go?

Assume he's a serious athlete in good shape, standing on a regular longboard with no bindings, and he wants to go as high as possible and survive the launch.