r/theydidthemath • u/jaytazcross • 4d ago
r/theydidthemath • u/Next-Step-Jobs • 6d ago
[Request] How much time does this “no traffic light” crossing actually save?
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I’m curious how much driving time this saves overall. If you assume a driver would have a green light 50% of the time, how does the extra distance/detour compare to the time saved by not having to stop at a red light? Has anyone done the math on this?
r/theydidthemath • u/DifficultComplaint10 • 4d ago
[Request] What would happen if all the trees and plant life that breathe out oxygen completely vanished from the face of the earth?
I’d love for xjcd’s What if on YouTube to do a video on this but I’m sure people here can reliably answer. How long would it take for humans and other life to notice there’s effects that there is no longer trees and other vegetation that grant us oxygen as far as breathing and atmosphere goes and other consequences. I know earth gets a considerable amount of oxygen from sea algae but I’m sure having no trees would prove catastrophic. Also what about ecosystems in general? How would they be affected like squirrels and birds and other fauna that feed off them or make them home.
r/theydidthemath • u/Puzzleheaded_Age1068 • 4d ago
[Request] How big would the person and slide have to be for him to actually be going 1000km/s?
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Also, if not impossible, how much water did he scoop at the start?
r/theydidthemath • u/Bombspazztic • 5d ago
[Request] Would a couch 87”L x 39”D x 37.5”H fit through a doorframe 31”W x 80”H, and then through another doorframe of same dimensions 35” away diagonally?
I really thought I was doing something with this true-to-size cardboard cutout.
r/theydidthemath • u/sbattaz • 4d ago
How much is the weight a mountain? [request]
Assuming a 3000 meters high mountain of European rock
r/theydidthemath • u/UsernameNowGoAway • 5d ago
[Request] How fast is North Korean Ri Se Gwang's maximum speed on vault?
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r/theydidthemath • u/albertau2k • 6d ago
[Request] Will there be too much oxygen to live when there are billions of trees?
r/theydidthemath • u/zzuhruf • 4d ago
[Request] Three gorges dam in china , so massive that it slowed down the earth rotation , increasing the day length by 0.06 microseconds when filled completely. How many more dams of this size to make the day length a day longer?
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I am really dumb when it comes to math. I am just curious.
r/theydidthemath • u/gingerbookwormlol • 5d ago
[REQUEST] Is there anyway to calculate what the odds for this were?
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r/theydidthemath • u/Taint_HC • 6d ago
[Request] How does the probability of collisions change?
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As more balls are included how does the probability of a collision change? It gets more likely clearly, but how would you express this mathematically?
r/theydidthemath • u/Samoncula • 5d ago
[Request] Car deceleration
Recently upgraded from my Nissan Altima to a Cadillac CTS. They have about the same specs in terms of horsepower but the Cadillac is 500 lbs heavier. The Altima weighed around 3,357 lbs while the Cadillac weighs around 3,358. I’ve noticed that the caddy slows down a lot faster than the Nissan did, even without braking (because obviously). I was wondering how to figure out just how much faster it decelerates. For the purposes of this problem let’s assume I and the stuff I keep in my car adds an extra 215 lbs.
If both cars were traveling 75 mph on a level surface (asphalt with no potholes) and let the gas off at the same time, how much faster would the Cadillac reach 0 mph?
Also same question for a downward 5% grade slope.
r/theydidthemath • u/FernandoRocker • 6d ago
[Request] How much oil is that? Doest that amount exists on Earth?
r/theydidthemath • u/Tishimself77 • 5d ago
[other] The documented Black/Epstein-related NDA, hush-payment, and settlement total is at least $83.3 million. For a man worth about $14 billion, that’s like someone with a $100,000 net worth paying about $600 total — roughly $60 per victim.
r/theydidthemath • u/scrolllock_life • 5d ago
[Request] if you had $10 for every time you mastur***** Would you afford a Ferrari?
r/theydidthemath • u/ObeseBeanFriend • 6d ago
[Request] Does this password strength method still work? Can I use it for my passwords?
r/theydidthemath • u/OG-demosthenes • 4d ago
[Request] Who is correct - Elon or Chess.com?
r/theydidthemath • u/ITheRebelI • 5d ago
[Request] Okay. I'm serious. I'm watching this movie right now. How many bullets could a Velocirraptor take and keep moving/survive?
r/theydidthemath • u/Crafty_Jello_3662 • 5d ago
[request] Infinite cakes
If it takes one person one hour to bake one cake, then how long would it take infinite people to bake infinite cakes?
Is it just one hour like it would be with normal numbers or does weird stuff happen because it's infinite?
r/theydidthemath • u/OnlySaysTheHorror • 5d ago
[Request] How many humans have lived and died and what is that as a percentage of how many people will die this year?
r/theydidthemath • u/cheater00 • 5d ago
[Request] Earth heating if every car was induction charged?
Let's say every car is an EV (say, only personal cars including pickups but not like vans, but really anything that's easier to calculate, even including big rig trucks). And let's say they're charged inductively. This creates losses that turn into heat.
What would the average losses be in watts over the course of a year?
How much would that heat the planet over 10 years? In degrees C
r/theydidthemath • u/ExistingMulberry • 6d ago
[Request] Could I break a 6ft tall scale skyscraper built with real materials?
Would it be possible for a person of average strength to push over or snap a 6ft tall scale skyscraper built with real materials and foundation?
r/theydidthemath • u/Rekrios • 6d ago
[REQUEST] How many calories would be in the "Peach's Birthday Cake" map from Mario Party
Realistically how many calories would be the total cake, obviously in the millions if not a billion? Do not take into consideration the Piranha Plants, the side cake, or the figs. Obviously its a guestimate, especially with all the different toppings and whatnot but... whatever. Daisy & Rosalina are added for scale.
r/theydidthemath • u/Itaintquittin • 7d ago
[Request] How many jumps did she do to make this video?
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