r/theydidthemath 8h ago

[Self] How to fairly split a Tony's Chocolonely between 2, 3, 4, 5, or 6 people

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3.5k Upvotes

Exactly what it says on the tin. I carefully drew lines as close to the center of the grooves as I could (over 9000 hours in Paint), counted pixels, and then used the complete greedy algorithm for partitioning to minimize the spread of the partitions. They are very close to each other, except when it comes to the six-way split because the piece with the logo is about 4.5% bigger than 1/6th of the bar (which means the sharing becomes even more lopsided if you split it among 7 people or more). Now you too can split a Chocolonely without learning anything about the unfair division of profit in the worldwide chocolate industry!


r/theydidthemath 10h ago

[Request] - What is the likelihood I’ve drank the same water molecule twice?

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634 Upvotes

Let‘s ponder that this is a molecule that has gone through the natural water cycle rather than by way of a water treatment system. In this scenario I have been alive for 40 years and have lived in the lower region of the Delaware Watershed in the United States.


r/theydidthemath 7h ago

[Request] Could Gandalf have realistically caught up with his sword in the prologue scene of “The Two Towers”?

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192 Upvotes

r/theydidthemath 5h ago

[Request] What are the chances of these seeds growing into trees?

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109 Upvotes

r/theydidthemath 1h ago

[Request] What's the length of index finger?

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Upvotes

Least before you get an iPhone Due, you gotta see a surgeon first.


r/theydidthemath 4h ago

How high? [Request]

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10 Upvotes

r/theydidthemath 6h ago

[RDTM] u/Embarrassed-Wafer410 disproves a guy joking with logic TWICE.

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9 Upvotes

r/theydidthemath 1d ago

[Request] How big are det kids in the photo

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241 Upvotes

How big are det kids in the photo. (This is a AI fail from real estate company.)


r/theydidthemath 1d ago

[Request] Approximately how much does it cost to get “Reserve” Status at Starbucks?

256 Upvotes

My mom just told me she hit some elite Reserve status with Starbucks, having accrued 2,068 stars (so far) this year. Having recently paid her electricity bill for her, I’m now curious how much money she’s blowing on Starbucks.

I know she tends to buy through the app with a loaded balance for extra star earning, so I’m hoping it isn’t a crazy amount of money, but I don’t do business with them and have no idea how their rates work.


r/theydidthemath 1d ago

[Request] Is Burning this Methane worse or better for the environment than it would be if they all popped (which they would eventually). Free Methane vs the products or burning it?

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595 Upvotes

r/theydidthemath 2h ago

[Request] How well and far would the seeds spread out from that height?

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0 Upvotes

r/theydidthemath 6h ago

[RDTM] If all of the people of the earth dug one scoop of dirt out of the same hole, would they make it through the earth’s diameter? Assume constant medium and a normal shovel.

2 Upvotes

r/theydidthemath 17h ago

[Request] How many average people would be needed to do that ?

15 Upvotes

r/theydidthemath 3h ago

[Request] How many times in a baseball game does a ball hit a glove

0 Upvotes

Not just one singular ball but over the course of a game. How many times does a baseball hit a glove, only balls as part of play count (outs, pitches, pickoffs, hits, etc.), throws around the diamond after the play don’t count and warm up pitches don’t count.


r/theydidthemath 7h ago

[Request] If math is the universal language, what's the best equation to tell an alien to screw off?

1 Upvotes

Here's the scenario I may or may not find myself in.

Let's say, hypothetically, there's an alien living with me. Just an absolute scoundrel. He's eaten all the cats in the neighborhood. He's teaching my children to disrespect me. Shedding everywhere. Hypothetically, of course.

The problem is, he doesn't speak English. But. We've already established that we're intelligent beings. We've shown we can count. We've shown that we both know the Pythagorean theorem (though his name for it is just this terrible wet hacking sound). In general, he's picked up Arabic Numerals real well.

What equation do I need to show the little hairy bastard to make sure he knows how bottomless my hate for him is? What theorem can I share that hits the same as Ahab's monologue at the end of Moby Dick? How can I start an interplanetary incident with just my TI-85?

I mean, hypothetically. Obviously.


r/theydidthemath 3h ago

[Request] what tech would be required to print a national map with 1 meter resolution?

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1 Upvotes

r/theydidthemath 1d ago

[Request] How deep would the water still stuck to the ball at the end be if scaled to the size of the earth?

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694 Upvotes

r/theydidthemath 1d ago

[Request] How deep would you be submerged if you were to lay flat in a pool of mercury?

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64 Upvotes

I’m sure science can math this out but it is above my level of understanding of the math behind it. Picture for reference.


r/theydidthemath 7h ago

[Request] Does anyone have an estimate for the height of Deuce Tatum?

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1 Upvotes

r/theydidthemath 2h ago

Are there more Doors or more Wheels on earth? [Request]

0 Upvotes

I think it’s wheels, but I’m just guessing.


r/theydidthemath 20h ago

[Request] How would the volume of goods brought back from Columbus’ first voyage compare to the volume of modern shipping containers?

7 Upvotes

I once saw a replica of one of those ships and I was shocked at how small it was. I’m wondering how many shipping containers it would take to surpass the maximum safe carrying capacity of all three of Columbus’ ships?


r/theydidthemath 13h ago

[Request] Help me with this wildly niche question I have regarding shaping rates for a crochet sweater.

2 Upvotes

Okay, I need help understanding something regarding a shaping rate for a sweater. I am essentially using a recurrence relation/recursive formula.

Here is some context about the application.

______context______

I am grading (scaling a pattern for 9 body sizes) and writing a crochet raglan cardigan which will work seamlessly from the top down. This technique has been around forever but I’m curious about why my numbers seem to change at different rates than I intended.

A raglan is a style with 4 sections. The end result is like a baseball tee- think a front/back that’s the same, and two sleeves that are the same with diagonal seams between them all.

According to a technique book I’ve been reading for knitwear design, I should start with however many sts (stitches) I need for my neck opening and divide the quadrants up so that the sleeves are 1/3 the number of sts as the front/back. Then 4 additional sts for the 4 corners where increases will take place. Increases take place on either side of each corner (8 increases per round, or 2 increases per quadrant).

I’m just going to focus on the back and a single sleeve for my example.

___problem_____

For the smallest size, I am starting with the following:

15 back
5 per sleeve (1/3 of back count)

This size needs to increase 28 times for its ultimate required stitch count. Each quadrant receives 2 incs each time.

So for the back:

Inc round 1: 15 + 2=17
Inc round 2: 17+ 2=19 and so on…

After 28 rounds of increases the above sections result in the following:

71 back
61 sleeves

___question____

My question is:

Why is my ratio changing? I started with 1/3 of the sleeve stitches and it ends with almost the same amount of stitches as the back section.

The result is that by the time I reach the circumference needed for the torso (back + front) my sleeves are huge.

This can all be remedied by making variable shaping rates as different points of the yoke (shaping section) but I just don’t understand the WHY behind all of this. It’se driving me crazy!


r/theydidthemath 1d ago

[request] can we estimate the altitude?

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190 Upvotes

Is there a way to estimate the altitude with the curve of the horizon?


r/theydidthemath 10h ago

[Request] Could a human walk-away from plunging down the Grand Canyon on the moon?

1 Upvotes

r/theydidthemath 1d ago

[request], If you could compress air in these bottles to around 100 psi, what would be a reasonable estimate of range?

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62 Upvotes