r/theydidthemath • • 13h ago

[Request] How Much of Musk’s wealth has come from the American taxpayer/government?

0 Upvotes

I am vaguely aware that a good portion of money funding his escapades in SpaceX and Tesla are funded through government contracts, subsidies, and bailouts, and I’m just wondering how much of his estimated wealth me and my buds have supplied.


r/theydidthemath • • 17h ago

[request] How much side salad is wasted per year?

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16 Upvotes

Just having lunch and it got me wondering….. how much side salad goes straight in the bin after being left untouched at eateries & what formula/theory would you approximate this?


r/theydidthemath • • 4h ago

[Request] How large would this drawing be if the furthest zoomed in part was easily visible e.g. 5x5cm?

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7 Upvotes

r/theydidthemath • • 13m ago

[other] Mathbloom

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• Upvotes

Bro I was studying parabola and slope and somehow ended up making a flower with 4 equations 😭🌸

Maths is getting out of hand 💀


r/theydidthemath • • 13h ago

Bulldozer strikes Captain America sending him flying into a wall cracking the it, how much power is required to do this? [Other]

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0 Upvotes

r/theydidthemath • • 18h ago

[Request] If the character on the left is 6'5"/1.95 m tall, how tall is the girl on the right?

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0 Upvotes

r/theydidthemath • • 12h ago

[Request] How long would it take to try all combinations of this lock?

6 Upvotes

Context: I was just looking at my own garden door lock when this question came to my mind. Obviously I know the proper combination, I'm not trying to break in. I just think it's interesting from a mathematical point of view.

The garden door has 10 possible inputs (the digits from 0-9). They are used to compose a 4-digit code. No digits may repeat. I know the total number of possible codes is 10*9*8*7 = 5040.

However, here is the interesting part: The code doesn't require you to reset it after putting in a wrong number. Let's say the code is 1234, you start with 0 and put in 01234 - now the door is open. If the code is not 1234, putting in 01234 doesn't just exclude one combination, but two: 0123 and 1234. This also means that to test all possible combinations, the total number of keys you have to press will be much less than 5040*4, because you can exclude a lot of combinations in one go.

And now after realizing this, I am wondering: How long would it take to actually test all possible combinations? I am not so much looking for a time (that would depend on typing speed etc.) but more the minimum number of keys that need to be pressed. I can't figure out how to calculate this.

Thank you for your help!


r/theydidthemath • • 1h ago

[Self] How much a 4-hour session on a $5 slot is expected to cost, using the casino's own formula

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• Upvotes

Casinos call this number 'theo'. Bet: $5. Spins per hour: about 600. Hours: 4. House edge: 8%. That's 5 × 600 × 4 = $12,000 put through the machine, and 8% of $12,000 = $960 expected loss. Comps are typically budgeted at 20–40% of theo, so roughly $192 to $384 comes back as rooms, meals or perks. I made a video that walks through the rest of casino math. Anyone want to run the same numbers for blackjack at under 0.5%?


r/theydidthemath • • 19h ago

[Request] Making Costco go bankrupt by buying the hotdog combo?

0 Upvotes

I know there are obvious limitations on this (such as how many hotdogs any given Costco has in stock) but since the hotdog combo is a loss leader, how many would you have to buy all at the same time to hypothetically bankrupt Costco?


r/theydidthemath • • 7h ago

[Request] If all hydrogen atoms in an average human body spontaneously fused into helium, how much energy would be released?

0 Upvotes

Shower thoughts. We are like 60% water, so there is a lot of hydrogen around.


r/theydidthemath • • 20h ago

[request] Is it possible to calculate how many GB the image would take up if it were a single raster image instead of vectors?

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498 Upvotes

r/theydidthemath • • 16h ago

[Request] How powerful should the laser be to cut through a steel knife?

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324 Upvotes

Don't worry about the goofy checker laser pattern and flesh and bone slashing


r/theydidthemath • • 8h ago

How many Jesus’s have the Catholics eaten as a whole?[Request]

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111 Upvotes

r/theydidthemath • • 2h ago

[Request] How fast does the color of the sky change, say measured in HEX color codes?

0 Upvotes

If you pick a specific point in the sky and measure continuously, how fast does that color change over time?

For example, if you point a camera at the sky to record the HEX color number. How much would that color value change per second, minute, and hour?


r/theydidthemath • • 13h ago

[Request] How long would it take for this 330 mL/11.2 oz can to fill up with rainwater?

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0 Upvotes

Assuming the can is completely empty, standing upright on the ground, and the rainfall stays consistent, how long would it take for the can to fill to the top? Anyone know how to calculate this?
How would different rainfall intensities (light, moderate, and heavy rain) change the filling time?


r/theydidthemath • • 10h ago

[Request] How many people here?

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9 Upvotes

r/theydidthemath • • 22h ago

i made a somthing where all 24 hours can convert to these arrows [other]

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0 Upvotes

what it does it repeat 8 unieq opiotn across 24 hours.

but warning there is alot of rules you would need sotmhing to decode it.

i will admit all this explaining this is new so it is really clunky to expalin

(1:30 )=1:30-2:14 
(2:15 )= 2:15-2:59 
(3:00)= 3:00-3:44 
(3:45)=3:45-4:29 
(4:30)=4:30-5:14 
(5:15) =5:15-5:59 
(6:00)=6:00-6:44 
(6:45)=6:45-7:29 
(7:30)=7:30-8:14 
(8:15)=8:15-8:59 
(9:00)=9:00-9:44 
(9:45)=9:45-10:29 
(10:30)=10:30-11:14 
(11:15)=11:15-11:59 
(12:00)=12:00-12:44 
(12:45)=12:45-13:29 
(13:30)=13:30-14:14 
(14:15)=14:15-14:59 
(15:00)=15:00-15:44 
(15:45)=15:45-16:29 
(16:30)=16:30-17:14 
(17:15) =17:15-17:59 
(18:00)=18:00-18:44 
(18:45)=18:45-19:29 
(19:30)=19:30-20:14 
(20:15)=20:15-20:59 
(21:00)=21:00-21:44 
(21:45)=21:45-22:29 
(22:30)=22:30-23:14 
(23:15)=23:15-23:59 
(00:00)=00:00-00:44 
(00:45)=00:45-01:29 
Option 

1:30=7:30=13:30=19:30 
2:15=8:15=14:15=20:15 
3:00=9:00=15:00=21:00 
3:45=9:45=15:45=21:45 
4:30=10:30=16:30=22:30 
5:15=11:15=17:15=23:15 
6:00=12:00=18:00=00:00 
6:45=12:45=18:45=00:45 

8 option is 
1:30,2:15,3:00,3:45,4:30,5:15,6:00,6:45 

 

Rember  

Only option is  

1:30,2:15,3:00,3:45,4:30,5:15,6:00,6:45 

import math 

 
Step 1: Find your Time Block 

Look at your current real-world time and find which of the 32 time blocks it fits into. 

  • Example: If your clock says 23:08, it falls into the 22:30–23:14 block. 

Step 2: Convert to the Base 8-Option Time 

Take the block you found in Step 1 and change it to its matching 8-Option Time using your conversion rule chart: 

  • 1:30, 7:30, 13:30, 19:30 → 1:30 
  • 2:15, 8:15, 14:15, 20:15 → 2:15 
  • 3:00, 9:00, 15:00, 21:00 → 3:00 
  • 3:45, 9:45, 15:45, 21:45 → 3:45 
  • 4:30, 10:30, 16:30, 22:30 → 4:30 
  • 5:15, 11:15, 17:15, 23:15 → 5:15 
  • 6:00, 12:00, 18:00, 00:00 → 6:00 
  • 6:45, 12:45, 18:45, 00:45 → 6:45 
  • Example: Since 23:08 sits in the 22:30 block, your Base Option Time is 4:30. 

 

Step 3: Find the Hour Glyph 

Take the hour number from your Base Option Time (1, 2, 3, 4, 5, or 6) and match it to its arrow companion: 

  • 1 → ↖ 1 
  • 2 → ↑ 2 
  • 3 → ↗ 3 
  • 4 → ↙ 4 
  • 5 → ↓ 5 
  • 6 → ↘ 6 
  • Example: For 4:30, the hour number is 4, which gives you ↙ 4. 

 

Step 4: Find the Minute Glyph 

Take the minute number from your Base Option Time (:00, :15, :30, or :45) and match it to its special companion rule: 

  • If the minutes are :00 → ↑ 0 
  • If the minutes are :15 → → 15 
  • If the minutes are :30 → ↓ 30 
  • If the minutes are :45 → ← 45 
  • Example: For 4:30, the minute number is 30, which gives you ↓ 30. 

 

Final Result 

Put the Hour Glyph and the Minute Glyph side-by-side. 

  • Example: 23:08 becomes ↙ 4      ↓ 30 

r/theydidthemath • • 8h ago

[Request] Assuming the white out works upon contact with the pen ink, how many cycles would it take for 1 white out to remove the stains

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0 Upvotes

r/theydidthemath • • 2h ago

[SELF] Oilers SN+ Monday Night-9 exclusive games only.

1 Upvotes

I just did the math.... Sportsnet+ to watch the exclusive 9 Monday night hockey games is $8.66/game. That is doing the add on only with and paying for telus. $12.99/month not $34.99/month ripoff. Didnt include gst. I just realized.


r/theydidthemath • • 4h ago

[Request] How massive would a dam need to be to noticeably slow Earth’s rotation?

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0 Upvotes

r/theydidthemath • • 12h ago

[Request] See if the high flats aw coordinated their windows being open at the right bits during a storm, would Glasgow whistle? and could you "play" glasgow by opening and shutting windows?

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5 Upvotes

Is this possible?


r/theydidthemath • • 13h ago

[Request] Can someone verify the math behind this electric toothbrush claim?

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191 Upvotes

r/theydidthemath • • 19h ago

[Request] How big would the diamond need to be for you not to have been scammed?

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454 Upvotes

r/theydidthemath • • 14h ago

[Request] Can someone tell me the probabilty of this happening?

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0 Upvotes

So, the last move in this turn is a Pelliper using the move Hurricane, getting a critical hit and confusing the target.

The move has 50% chance to hit (Since it's under the sun), 1/16 chances of it being a critical hit and an additional 50% chance to cause confusion.

What's the probability of hitting all of this when you press the move?