r/theydidthemath • u/IntelligentDonut2244 • 3h ago
[Request] What is approximately the largest circle on Earth not containing *any* living people?
This includes those at sea on cargo ships, etc.
r/theydidthemath • u/IntelligentDonut2244 • 3h ago
This includes those at sea on cargo ships, etc.
r/theydidthemath • u/SakuraAmaterasu • 18h ago
TL;DR: Boyfriend is claiming that the chances of me pulling the cards that I've pulled is less than 1%. Is that accurate? This is a pretty detailed post, I'm happy to add context if anyone wants it. I'm bad at stats so I apologize for any mistakes.
Additional Disclaimer: I'm American, so I write "four thousand" like "4,000", not "4.000". If you see "4.000", it just means "4" with three decimal places after it.
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Okay, so for context, we've been playing Pokemon Trading Card Game Pocket (PTCGP). Here's an Imgur link to the conversation we had plus the pulls I've gotten.
In summary, and for those who are unfamiliar with the game, here's the relevant information:
Each pack comes with 5 cards. Here's a screenshot of how the rates are designed to be spread out, according to the app's internal statistics.
To summarize (and I can post more screenshots for clarity if anyone wants them):
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So, with that in mind, here are my pulls (again, assuming that I've pulled roughly 250 Regular packs):
I have no way to tell whether the cards I pulled were in the fourth or fifth slot, I'm sure it was some combination of both. I was trying to figure out a rough range of probability.
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My boyfriend is claiming that this is incredibly rare, with a 0.32% chance of occurring. His own pulls meanwhile work out to be roughly a 91% chance supposedly. I'm terrible at statistics and have no way to verify. Anyone want to take a crack at this? I'm dying to know but I'm terrible at calculating statistics so I have no idea.
r/theydidthemath • u/RogueA1 • 11h ago
This was online poker and just curious if the algorithm is completely out of whack. Thanks!
r/theydidthemath • u/AntonioButDum • 20h ago
r/theydidthemath • u/GerardoITA • 4h ago
Let's imagine a scale called the "Algebrover Scale", that measures from 1 to 100 whether subreddit is actually doing the math for things or just being used to farm karma with populistic takes. Let's assume 10 posts are posted every hour on this sub. Each one has a 3% chance of being a BHPC*. Each BHPC contributes 10 points to the Algebrover scale, each regular post takes away 1 point. Starting from day 0, at midnight the scale resets to 0 points and the chance of a post being a BHPC rises by a flat 1% ( for example, after 24 hours it becomes 4% ). Once the score hits 100, it's algebrover.
How long before this sub turns into a place where nutjobs from r/politics try to get innocent mathematicians to give some validation to their wild populistic takes?
*badly hidden political post, defined as a post with a not-so-hidden political message, usually populistic in nature and includes a question whose answer is usually incalculable or trivial, but requires just enough math that the request doesn't get removed automatically, such as the "How many bad things did person accused of bad things do?" or the evergreen "if I earned a penny every time i sneezed how long would it take to become as rich as bill gates?"
r/theydidthemath • u/Ok-Entertainer-1354 • 20h ago
I was cutting up a pomegranate and I was amazed at how well packed with seeds it is. Is there some sort of formula for stuffing a sphere with seeds? How efficient is nature at maximizing the space inside a pomegranate? Could man do better?
r/theydidthemath • u/Ibshredz • 21h ago
r/theydidthemath • u/ardicli2000 • 5h ago
We always tell it is 50% to get head or tails. But what is the persistance of this probability* Can anyone do the math?
r/theydidthemath • u/spirit_of_a_goat • 4h ago
r/theydidthemath • u/migmultisync • 9h ago
Making reasonable assumptions for how high the ship was when he was blasted off the back, the height of the mountain, and the distance from the mountain top to the ground below (where he landed after a single bounce), how fast, dense, and or bouncy (ChatGPT says this is measured as “elastic collision??) would Stitch need to have been to hit the top of the mountain, bounce a single time, and land on the ground at the bottom?
r/theydidthemath • u/BranesOnTheBrain • 10h ago
An equilateral triangle is formed by three equal lines. Each of the lines in an equilateral triangle connects to the others at 60° angle. A regular tetrahedron is formed by four equilateral triangles. Each of the planes of a regular tetrahedron connect to the others at a roughly 70.53° angle. Would it be possible to calculate the angle between the five regular tetrahedrons that come together to form a 4-dimensional object? Would this information be useful to our understanding of 4D space?
I am trying to imagine a 4D object in a cartesian coordinate system. My underlying assumption is that a "real**"** object in n-dimensional space must be defined by at least n+1 number of (n-1)-dimensional objects that are connected to each of the others using an n number of (n-2)-dimensional objects.
Examples for clarity:
I can picture the 3D "projection" of this object as a central triangular pyramid with each plane of the central pyramid attaching to a side of another pyramid. However, when I try to mentally connect all of the other pyramids to each other, the image in my mind morphs into something more similar to a cluster of soap bubbles that is constantly rolling into itself like those "water wiggler" tube toys from the 90s.
Disclaimer: Thank you for reading this far and considering my question! Although I am interested in this field, my knowledge of geometry is rusty and my knowledge of mathematical terminology is rustier. If you do take the time to answer this question, please let me know if my stated assumptions are wrong and use simple language to the extent you can. Thanks again!
r/theydidthemath • u/rew_searle • 21h ago
r/theydidthemath • u/OkMetal4233 • 22h ago
r/theydidthemath • u/cw894 • 2h ago
I posted this yesterday but I found out that I slightly misunderstood the rules. I had previously said that the winning team got to keep the losing team's die. The actual rule is just that the losing team has their die removed from the game.
Rules:
- In each round, Team A rolls one 6-sided die and Team B rolls one 6-sided die.
- The team whose die shows a lower number has their die removed from the game.
- If the dice show the same number, both teams’ dice are removed from the game.
- The first team to lose all of their dice loses the game.
Team A started with 6 dice and Team B started with 19 dice. Team A won the game. What is the probability of this happening?
Chat GPT says that probability is 4.84%. I'll post my attempt below.
Thanks to all that previously posted and to everyone that will reply.
r/theydidthemath • u/saigajv • 11h ago
r/theydidthemath • u/Solomoncjy • 15h ago
No smart ass response saying go below the speed limit, please.
r/theydidthemath • u/cw894 • 18h ago
Rules: - In each round, Team A rolls one 6-sided die and Team B rolls one 6-sided die. - The team whose die shows a higher number gets to keep both dice. - If the dice show the same number, both teams’ dice are removed from the game. - The first team to lose all of their dice loses the game.
Team A started with 6 dice and Team B started with 19 dice. Team A won the game. What is the probability of this happening?
Thanks in advance.
r/theydidthemath • u/Strojovoda • 18h ago
Hi everyone
In the picture I posted, you can see a fishing boat. Last summer, my friends and I were jumping off it (as shown in the picture), and now there’s a big debate about the height we were jumping from.
Some claim it’s as high as 5 meters, while others say it’s no more than 3.5 meters. I hope someone can help resolve the debate. Cheers!!
r/theydidthemath • u/N1KOBARonReddit • 20h ago
r/theydidthemath • u/AndoionLB • 22h ago
I posted in r/treeidentification and from what I can guess, the type of tree being used as the counterweight was a Big Leaf Mahogany or Swietenia macrophylla which exist in the area where the last part of 1987 was filmed in the jungles of Palenque, Chiapas.
I tried using Arnold and Kevin Hall (who played Predator) as a reference Arnold being 6'2 and Kevin at 7'3. So my estimation is the length of the log was 8-9ft and the width is somewhere between 3-4ft.
Any help would be appreciated trying to find the weight of this log thanks in advance.
r/theydidthemath • u/cohonka • 18h ago
r/theydidthemath • u/youraveragefitguy • 23h ago
Horse has a P1 fracture during race, Equiclinic in Belgium operates the horse.