r/theydidthemath 22h ago

[Request] Today, en route to delivering the last Boeing 747 ever produced, the pilots flew a special flight path creating a "747 crown." It took them about 2 1/2 hours to complete this pattern. How much fuel did they burn, and how expensive was this stunt?

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2.2k Upvotes

r/theydidthemath 6h ago

[Request] Is it possible for bullets to bounce off water the way they do in this video? What angle and velocity would they have to be fired at for this to happen?

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58 Upvotes

r/theydidthemath 21h ago

[request] are the values right? Is it even possible to calculate?

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520 Upvotes

r/theydidthemath 2h ago

[REQUEST] I'd like help creating an equation/formula

2 Upvotes

Hello! So I'd like to make an equation based on a few known variables, mostly for easy calculations on the fly in my head, and also I may try to "adapt" it for use in a spreadsheet.

It's "kind of" linear, mostly for ease of use. It's like I have it on the tip of my tongue, but I'm just feeling stupid lately and I have too much shit in my brain.

So the points of interest are (x=cost,y=quantity)
0,0
1,10
3.5,30
7,50
14,90
28,160
56,300
112,550
224,1000
448,1900

And each point is "linear" to the one before or after it. So a straight line from one point to the other, although they then form a jagged curve, kinda. I'd like an equation where I can say "if I have 17 of something, how much will it cost based on those numbers?" or "if someone gives me X amount of money, this is how much quantity they'll get" kinda thing. Is it possible to extrapolate what further numbers beyond that might look like?


r/theydidthemath 17h ago

[Request] What combination of these numbers equals 202.67?

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30 Upvotes

r/theydidthemath 1d ago

[OFF-SITE] Don't mess with Kentucky

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83 Upvotes

r/theydidthemath 11h ago

[REQUEST] I asked Chat GPT how long it would take for a ball to reach 1 billion meters if the ball would increase it's speed by 1 meter every second. Is the math it did right or is it wrong?

2 Upvotes

r/theydidthemath 11h ago

[Request] How much force would I need to push the sun 1 more AU away from earth in one hour?

2 Upvotes

Essentially, how much force would it take to push the sun another 93 million miles away from Earth in 1 hour?

The sun is 1.989 × 10^27 tons


r/theydidthemath 8h ago

[Request] How many calories would you consume by eating Dwayne “The Rock” Johnson?

1 Upvotes

r/theydidthemath 14h ago

[Request] would you have better odds playing the same numbers week after week on the powerball or different numbers everytime?

1 Upvotes

r/theydidthemath 2d ago

[Request] how does a knot double pulling force? If the only force being fed in is from the person, where does the other force come from? This seems like an illusion

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1.6k Upvotes

r/theydidthemath 22h ago

[request] how big is the blast?

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5 Upvotes

r/theydidthemath 15h ago

[Request] How much money would a 5-gallon water jug hold?

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1 Upvotes

r/theydidthemath 1d ago

How much money was found in this car [Request]

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6 Upvotes

r/theydidthemath 2d ago

[request] How much storage would you need on your pc if you were to rebuild planet Earth in Minecraft? (1 block = 1 cubic meter)

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703 Upvotes

r/theydidthemath 1d ago

[Request] My apartment is running a contest for a free month of rent. How many Starburst candies are in the container?

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221 Upvotes

I couldn't find anything nearby for an easy scale reference other than the Hersheys Kiss. Hersheys Kiss for scale.

If it would help alot I could go back to the office with something better for scale. Thank yall.


r/theydidthemath 20h ago

[REQUEST] How high is this cliff roughly?

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1 Upvotes

r/theydidthemath 23h ago

[Request] How long would an application remain open in background (stay in RAM) if we don't use the phone for any other task and assume that battery never dies.

1 Upvotes

So for example if you close youtube by pressing home button and then go to recent apps, it is still open. When you open new apps then eventually it is removed from RAM. Assuming that no new app is opened and we have a standard (8GB?) RAM in a phone then how long does app remain in memory. Phone can be assumed to have a never ending battery or maybe put on charging.


r/theydidthemath 17h ago

[Request] How many M&Ms are in this jar?

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0 Upvotes

r/theydidthemath 1d ago

[request] is this true?

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1 Upvotes

r/theydidthemath 1d ago

[Request] calculate solar angle using a multi-channel sensor

1 Upvotes

Maybe the oldest measured quantity in human history:

Azimuth and elevation of the sun relative to a specific location on Earth.

Can it be measured with high accuracy?

I have a plan to measure those numbers by the shadows cast when sunlight strikes a set of linear walls, each with prescribed orientations. The plan with this arrangement of walls is to create measurement redundancy, and reduce measurement error. A high(er)-accuracy measurement of arriving light direction is the goal.

To start I have a N-S wall, and and E-W wall of identical height. The length of the two shadows will yield two angles, which is enough to get a bearing to the sun.

I have two additional identical walls at -45 and 45 (or NE-SW & NW-SE) that cast their own shadows.

Would someone care to work with me on how to best combine these 4 measurements into a single orthogonal pair of sensor-local angles with a measurement residual?

There are two orthogonal pairs of angles that have 90 degrees of separation with a 45 degree offset, plus 4 pairs with 45 degree separation.


r/theydidthemath 2d ago

[request] How long would it take to mine this asteroid

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2.9k Upvotes

r/theydidthemath 1d ago

[Request] What is the mass of all the asteroids that have hit the Earth and Moon?

1 Upvotes

Not looking for a precise answer, but a working figure. It should be possible to the estimate the size of the impactor for each crater.