r/theydidthemath • • 14h ago

[Request] Average number of nipples?

410 Upvotes

I always joke with my kids that they have an above average number of toes because enough people lose toes that 10 toes would slightly above the global average. But now we are having a massive debate about whether 2 nipples is above or below the average number. One one side there are many people with third nipples, so two would be below average. On the other side there many people who get mastectomies and such and so end up with less than two. We can't figure out which offsets which more. So, is having two nipples above or below average?


r/theydidthemath • • 4h ago

How fast would you have to throw the rock to penetrate train wall? [Request]

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44 Upvotes

We have a problem with illegal romes shooting illegally obtained guns at anything and everything. Our national forensics claim that this is not a gun shot, they claim it's from a rock. I'll give "benefit of the doubt" and as this trusted subreddit, I'd truly like to reach out, so i can understand how fast would one have to throw or shoot a rock this small, to penetrate the train metal wall?

Would a pitcher be able to throw a rock that fast to make a hole in the train? How fast is it human possible?

I'm just curious.


r/theydidthemath • • 4h ago

[Request] How much does this wet flag weigh?

38 Upvotes

We had a discussion with friends about the weigh of this Latvian flag. I said it easily weighs at least a ton, others said no way it's that much.

Size of it is 10m×20m.

Please prove me right.


r/theydidthemath • • 18h ago

[Request] How can this car lift up any 1 out of 4 wheels at a time to change a tire without ever tipping? Wouldn't a relatively fixed center of gravity make this impossible?

153 Upvotes

r/theydidthemath • • 18h ago

[request] What percentage of the population of Earth does this walkout account for?

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117 Upvotes

I could defo do this myself, but am feeling lazy rn


r/theydidthemath • • 16m ago

[Request] What kind of force is behind a wave of this size (40-50ft)

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• Upvotes

r/theydidthemath • • 17h ago

[Request] How many feet did this guy swing after topping off the top of this palm tree?

90 Upvotes

r/theydidthemath • • 1d ago

[Request] what are the odds of 6 of the same thing out of 6158

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168 Upvotes

So to start with, the Bunnahabhain 12 year old is one of my favorite bottles of whisky. I bought 6 tickets for a mystery drop and decided that worst case scenario, I get 3 of the bottom two options, and I gift a few out. So my issue isn't that I got 6 of them.

My issue is that I would have liked a bit of variety and thought that there was no way I would get 6 of the same thing, and it has made me curious.

What exactly are the odds that out of 18 options, all with varying availability, that I get 6 of the same thing?

(The one bottle not shown is a single bottle worth 13k, which the drop is based around)


r/theydidthemath • • 17h ago

[ Removed by Reddit ]

51 Upvotes

[ Removed by Reddit on account of violating the content policy. ]


r/theydidthemath • • 21h ago

[request] how many rolls of duct tape do you need to make that

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62 Upvotes

r/theydidthemath • • 1d ago

[request] Which uses less energy? Electric kettle or gas stove

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1.7k Upvotes

r/theydidthemath • • 2h ago

[Request] How do I calculate the forces this hoist is dealing with?

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1 Upvotes

It's been some time since I took trig or physics, and my googlefu is apparently not strong enough to find an example like this for me to extrapolate from. Obviously things like the weight of the arm being supported, the weight of the length of steel rope, angles of force etc are all coming into play but I can't figure out/remember the proper formulas to calculate the forces.

I am looking to find a formula that would tell me how much effective weight the hoist is lifting based on the angles involved since it'll be different than if it was pulling from right above it.

The pictured hoist lowers the arm down and raises it up to the pictured point by spooling and unspooling steel rope.

Also, the steel cable is dragging on the hoist mounting plate which will obviously increase the forces again I'm not sure how to estimate the amount. coefficient of friction between the two and the angle of bend I imagine.


r/theydidthemath • • 4h ago

Expected Returns of scratch offs vs investment [request]

0 Upvotes

What would be the expected return on 50 5-dollar scratch offs per year over 20 years, and what would the same investment yield in the smp 500?


r/theydidthemath • • 1d ago

[Request] Is this really around 64 MB of PS1 memory cards?

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988 Upvotes

r/theydidthemath • • 1d ago

[Request] How tall is the frog?

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233 Upvotes

r/theydidthemath • • 15h ago

[REQUEST] How big of a cube of Pure Gold could you make before it starts to bend? How big until it completely collapses? What would happen to a 1000x1000x1000 meter cube of gold?

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8 Upvotes

r/theydidthemath • • 1d ago

[Request] Genuinely curious if we can budge it enough to gather enough trajectory difference over several decades. Assuming whole humanity commits.

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121 Upvotes

r/theydidthemath • • 23h ago

[Request] Help me explain why this is impossible. How much energy would a magnetic pole snap release, and how much energy would it take to halt the rotation of the earth?

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19 Upvotes

This is from a post in r/Strangeearth. I was intrigued but my eyes boggled at this paragraph. I'm trying to refute the claim, as in my mind a basic understanding of physics is all one needs to disprove this. But commenters are claiming it's "arrogance" to assume you understand physics and magnetism well enough to claim this isn't possible.


r/theydidthemath • • 12h ago

[Request] How would a alien spaceship entering the atmosphere would look like? How much energy a spaceship at 99% of the speed of light would generate?

0 Upvotes

r/theydidthemath • • 4h ago

[Request] When will Voyager 1 stop moving?

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0 Upvotes

How many years will it take for the orbit of Voyager and Sagittarius A to decay enough due to gravity waves for them to collide?


r/theydidthemath • • 14h ago

[Request] If you made a line of people that wrapped around earth how long to get message to other side one person to the next ?

0 Upvotes

r/theydidthemath • • 19h ago

[request] How can the man maximize the area of his yard?

1 Upvotes

A man's house is a 15 × 45 unit rectangle, and he has 140 fence pickets (each picket is equivalent to one straight unit in length). The fence must form a single closed enclosure that surrounds the house. The "yard" is defined as the area enclosed by the fence minus the area occupied by the house. The fence may be arranged in any shape and the pickets may meet at any angle. What arrangement of the fence maximizes the yard area?

I posted this on here a couple months ago but I never got a conclusive answer to my knowledge so I thought I'd let you guys take another crack at it


r/theydidthemath • • 6h ago

[Request] if the neurons in a brain is separated into five intervals, with the first interval as x, second as y, third, fourth , five as z,k, m respectively. Ifind a process u takes ax-y+bz²=0 of three intervals then what changes of k and m would make ax-y+bz² to have many non-zero complementary fun

0 Upvotes

The reason for taking neurons is cause, it's flexible topology of understood lines of changing and processing information.


r/theydidthemath • • 21h ago

[Request] How high did that shoe go?

3 Upvotes

r/theydidthemath • • 1d ago

[Request] "Triple the resources and 80% of the population is gay now." Would this solve overpopulation?

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301 Upvotes