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Numbers are fun. Wait, no, don’t run away, Pandas! Please come back! Even though some of us might have PTSD flashbacks to math class whenever we’re forced to do anything more difficult than basic sums, there’s no denying how impressive genuine math skills can be.

And some math wonders take numbers very seriously, doing (probably) unnecessary calculations that are very impressive. The r/theydidthemath subreddit (not to be confused with its polar opposite, r/theydidndothemath) is the place for math-lovers to flex their skills in real-world situations.

We’ve collected some of the biggest math dunks from people who really took their time and did the math, so check ‘em out. Upvote your fave images as you scroll down and let us know in the comments about the awesome times that math proved incredibly useful.

#1

Serving Up Some Math To A Twitter Hypocrite

Serving Up Some Math To A Twitter Hypocrite

BehindMySarcasm Report

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#2

The Turtle Is Faster

The Turtle Is Faster

Fatsodaisy29 Report

#3

Bezos vs. Metallica

Bezos vs. Metallica

emissaryofwinds Report

Over 697k people make up the r/theydidthemath community and it’s been active since the Spring of 2013. Since then, they’ve partnered up and made friends with lots of other math and science-related subreddits that show the joys of being competent in your field and mixing that with a good sense of humor.

The r/theydidthemath subreddit isn’t just for showing off, though. It’s a friendly community that encourages people to ask for help from its members with any math-related problems that are making their lives miserable.

#4

Finnish People Might Not Exist..?

Finnish People Might Not Exist..?

Vqhr Report

#5

Pineapples

Pineapples

rogercoutts2 Report

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#6

So, About All Those "Lazy, Entitled" Millenials...

So, About All Those "Lazy, Entitled" Millenials...

arrybfg Report

Like with all things in life, getting good at math means putting in the time and practicing. You could have the best tutors, the brightest study buddies, and the most brilliant textbooks by your side (they certainly don’t hurt), but at the end of the day it all comes down to you sitting down and solving problems the old fashioned way.

With a sharpened pencil. A piece of paper. And an eraser the size of your headache. It’s about focused, smart, and daily practice. I’ll be completely honest with you for a moment: every single time that I was falling behind in math class, I’d get my grades back up when I put in genuine effort.

#7

A Whale Died With 64 Lbs Of Plastic In Its Stomach

A Whale Died With 64 Lbs Of Plastic In Its Stomach

misSxWartooth Report

#8

Approximately Speaking, Is This Correct?

Approximately Speaking, Is This Correct?

0–14 years: 18.73% (male 31,255,995/female 29,919,938)
15–24 years: 13.27% (male 22,213,952/female 21,137,826)
so 32% of the U.S.A. are between 0-24.
Assuming an equal distribution and only kids between 6-18 go to school we have around 16% of 6-18 year olds (12 years from a span of 24 years).
Assuming EVERY KID at any given time has to be in a class that means there is one teacher for every 15 kids or so. (Only public school). That's a lot of teachers.

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#9

"Do You Think I Have Peed 1 Million Times In My Life?"

"Do You Think I Have Peed 1 Million Times In My Life?"

CowboyState Report

But I’d never have made it if I didn’t have some incredibly friendly math sorcerers by my side, explaining things to me like I was 5 years old. Once you get the logic behind why certain calculations work like they do, things come more naturally… until you hit the next big roadblock. Hey, we can’t all be great at math (and I peaked in that area in the 3rd grade, unlike those who take their time and Do. The. Math.).

#10

Is This Correct?

Is This Correct?

Because our years are based around Jesus, and we are barely in to this year, I will say it has been 2019 years since Jesus’ birth. There are 8,760 hours in a year, and if you work 8 hours a day, every day, you will work about 2,920 hours a year. 2,920 hours a year for 2019 years is 5,895,480 hours in total. If you make 2,000 dollars each hour for 5,895,480 hours, you will make $11,790,960,000.
According to Forbes there will be 39 people richer than you

Unknown_legend34 Report

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#11

Is This True?

Is This True?

According to wikipedia, there are 2153 billionaires. They have a combined wealth of $8.7 Trillion. Subtracting $1B for each from that total leaves $6.547 T. So thats roughly correct, if a little bit low.

lts_LlT Report

#12

Jasmine And Aladdin

Jasmine And Aladdin

InnocuousCyanide Report

#13

Lads Lads Lads

Lads Lads Lads

matt-rhyssmith1 Report

#14

Triganarchy

Triganarchy

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#15

Smart Did It As A Comeback

Smart Did It As A Comeback

Vinccool96 Report

#16

Spongebob Goes Hard

Spongebob Goes Hard

dottie-swaan , twitter.com Report

#17

Gasoline

Gasoline

lasssdi Report

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Truth Monster
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Hope they don't want to be cremated....or the funeral home is gonna need a new roof...

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chi-wei shen
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

The mistake in this calculation is the fact that "calories" used to describe food are actually kcal or kilocalories, which has been abbreviated to "calories". I gallon of gasoline contains 31,000kcal, not 32,000,000kcal.

LLOC
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

btw caloric requirement is 1500 to 2500 kcal (not cal) So 4 liters = about 15 days

James Boyd
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Calories in food measurements are actually "large" calories which are 1000 of the calories used for energy calculation as would be the case in gas, so the correct conversion would be 31,00 Calories in a gallon of gas... if you want to do the math, do it right

Dorka
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

My dad used to say: "there's no such thing as edible mushrooms and non-edible ones. Everything is edible. At least once. Just after eating some stuff, you won't be eating anything anymore."

Jay Dresser
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Considering that "the rest of your life" is measured in minutes, yup, you're right.

Kusotare
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

If you chug a gallon of gasoline, you won't be needing ANYTHING forever.

SoulMan80
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Maybe that's why you're not supposed to syphon your fuel pump...even the fumes could kill you (or power you to run a few miles!)...

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#18

What Would The WiFi Password Be?

What Would The WiFi Password Be?

π.

plznotmesir Report

#19

Have I Eaten A Full Cow?

Have I Eaten A Full Cow?

ZylkaLeftridge Report

#20

What Are The Odds Of Guessing It Right?

What Are The Odds Of Guessing It Right?

Let's assume this is the USA. There were 165.92 million women and girls in the USA as of 2017. There's been some variation in the number of "Amandas" in the USA across sources, but 778,954 seems to be near the middle. That means around 0.4695% of the female population is named Amanda, and OP had a 0.4695% chance of who he called "Amanda" actually being named Amanda.

xinxilope Report

#21

Sonic The Mass Baby Murderer

Sonic The Mass Baby Murderer

Bennyboy1337 Report

#22

Futurama Does The Math

Futurama Does The Math

poliscijunki Report

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#23

When Your Barber Doesn't Study Math

When Your Barber Doesn't Study Math

gryffin__dork Report

#24

1 In 12 Chance Of Dying In Office

1 In 12 Chance Of Dying In Office

JPL7 Report

#25

Is This A Fair Representation Of The Sun To Earth Ratio?

Is This A Fair Representation Of The Sun To Earth Ratio?

The ratio for the radius is 100 to 1. Looks about right.
The Sun has 1 million times the volume of Earth, so you could fit several hundred thousand Earth-balls in.

live4lifelegit Report

#26

The Force Of A Carrot Falling At Terminal Velocity

The Force Of A Carrot Falling At Terminal Velocity

First : the terminal velocity of a carrot is NOT 147 mph A carrot has the same density as a human.
A human terminal velocity falling head first is approx 120 mph. The terminal velocity of two similar things falling is greater for something big because it has less friction by lbs than for something small. So a carrot can not fall that fast.
Second : the carrot will fall with the large side first. The thin part has more drag. Think of a drop falling. It's the same principe an you can try it by throwing a hammer.
Third : the force depends of the duration of the impact so it will have a greater force if it hit concrete and a lower force if it hit mud.
We need to calculate the kinetic energy If we take 0,1kg and 50mph (80km/h=22m/s) wich is more realistic as a final velocity we have E= 0,5mv2 E=0,50,122*22 E=24J
24J will probably hurt you way way less than a punch.

Leugim7734 Report

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#27

Super Soaker Math

Super Soaker Math

7olenge Report

#28

Discussing Bright With A Friend

Discussing Bright With A Friend

kokopelliman Report

#29

The One Time I Was Actually Intrigued On Doing The Math Myself

The One Time I Was Actually Intrigued On Doing The Math Myself

reddit.com Report

#30

Spongebob Lowkey Ripped

Spongebob Lowkey Ripped

koopasrock Report

#31

Math Break

Math Break

Galeaf_13 Report

#32

The Price Of Wings

The Price Of Wings

LivingRaccoon Report

#33

That’s A Lot Of Trees

That’s A Lot Of Trees

Lefty21 Report

#34

How Accurate Is This?

How Accurate Is This?

Thats close to correct. The helm is $170, Body armor is $124, Shield is $131, Body pouch is $30, Pepper spray is $16, Mask + Gloves are $70, Baton is $55, Non-lethal is $98, Rubber bullets $60,
Total= $854 per person...
Cover all is $3 {$75.73(with tax) for 25 people}, Mask is $8 {$160 for 20 people}, Face shield $2.70 {$135 for 50 people}, Gloves are $0.30 {$134.76 for 1000 people}, Thr appron is $0.50 {$48.92 for 100 people},
Total = $14.50 per person...
$854(1 person) ÷ 14.50(1 person) = 59.97.....
There are 59.97 (59 or 60) peoples worth of ppe coverage in 1 riot gear.........
Prices may vary state to state

theblackjesus666 Report

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#35

Haircuts

Haircuts

Caamsworth Report

#36

How Many Nuggets Would This Be In Total?

How Many Nuggets Would This Be In Total?

2.3 billion nuggets sold per year in America by 375,000 workers, hence each worker makes 613 nugget portions per year. This would mean he served an extra 613 nuggets over the course of one year, hence
1,533 extra nuggets in total.

F**kretails Report

#37

The Number Of Plants Needed To Replace The Oxygen You Waste

The Number Of Plants Needed To Replace The Oxygen You Waste

Humans consume anywhere from 20-30 liters of pure oxygen per hour. A leaf will typically give off 5 milliliters (.005L) of oxygen per hour. 20 liters consumed divided by .005 liters produced comes out to 4,000 leaves minimum, which comes out to 80 50-leaf plants.

bthnp Report

#38

Is This Possible?

Is This Possible?

We can try to make some simple Physics computation here. We can use Bernoulli's equation (which is basically just the principle of conservation of energy). In order for this amazing trick to work we need the urine to reach the point of zero (ideally a bit more than zero) velocity at a height higher than the head of a regular dude. Translated into the Bernoulli equation it reads:
0.5v2 > gh => it works => v > sqrt(2gh)
with v the initial velocity of the urine, g the gravitational acceleration (9.81 m.s-2), and h the height from the penis to the top of the head. Now I have measured this height for me and it’s around 1 meter. This means that I would need to pee at 4.4 meter per seconds to pull this off!
This brings us to the interesting question: How fast do we pee? Well, I did not research the depth of internet for this but I found this paper saying that the speed for boys is around 2.35 and 3.25 meter/s. So if it’s the case for me I would totally pee on myself, fail. But if you are a young boy or a dwarf you can make it! 2.35 meter per sec corresponds to 28 cm penis to head.
It might be that women have a higher urine velocity so they may have a chance (if they can aim towards the top which remains to be seen right…).

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#39

How Much Money Would Cost 71,000 Vhs?

How Much Money Would Cost 71,000 Vhs?

I'm gonna presume she bought tapes in bulk and made use of any available clearances and discounts. Based solely on this article I found from 1996, it seems that if you looked for a good sale you could get blank tapes at around $2 apiece in 1996, which is about $3.20 in today's money.
Using that as a baseline, it would have been around $230,000 over the years.
I imagine with buying that much she's could probably find somewhere with even cheaper prices, so it could have been even half that, but it's in the ballpark of the price of a house.

alexishdez_lmL Report

#40

How Many Cigarettes Would It Take?

How Many Cigarettes Would It Take?

Well it depends on when she would die without it. But let's say she has the biological/genetical prerequisites to become 100, based on how old her Mum was when she died, this doesn't even seem too unexpected (I hope I am not jinxing it). She would turn 114 in 2040. So we need to calculate how many cigarettes give her 14 years.
14 years are 7363440 minutes, including leap years. Those are 920430 cigarettes. Almost 1 Million. From 2020 on, smoking 126 cigarettes a day until 2040 would suffice. Those are 6 packs of 21 cigarettes. Oof. While 6 packs are excessive, it could be possible. Assuming he is awake 18 hrs per day, he needs to smoke 7 per hour. Still a lot of work.
Remember that he has to finish not in 2026, as the extra lifetime is not needed completely when she turns 100. Basically finishing a cigarette seconds before she would die would be good enough, she would be alive for 8 more minutes, and he would have 8 minutes to smoke the next one.

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#41

Swimming In PUBG Is Faster Than Michael Phelps

Swimming In PUBG Is Faster Than Michael Phelps

shortdwarf Report

#42

How Big Would Ant-Man Need To Grow For This To Work

How Big Would Ant-Man Need To Grow For This To Work

What is the structural integrity of Thanos's butthole compared to Antman's power armor. At least one would die, either by being crushed or ripped apart. If Thanos is the stronger one, Antman's crushed remains will just be extruded once he expands beyond the available space.

StickBreightley Report

#43

Is This Shoe Size Accurate?

Is This Shoe Size Accurate?

The shoe would be more than 40ft (12m) long so this doesn't appear to be true.
The UK shoes measurements are very close to the US measurements so I didn't bother checking that possibility.

doctorqwill Report

#44

Powering The World With Solar Panels

Powering The World With Solar Panels

Okay. Worl wide energy consumption is roughly 21 trillion kwh. Solar energy in the Sahara produces 2350kwh per square metre. This means we need a space of roughly 9000 square kilometres. This is roughly 0,1 percent of saharas total space. This checks out with the claim of the creator of this image. So this is accurate but the big problem with that is, that you cant transport this much energy over a wide range.

KarlGustavderUnspak Report

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#45

What Would Be The Speed If It Was Scale Up To Real Horse Size?

What Would Be The Speed If It Was Scale Up To Real Horse Size?

So apparently Woody is 15.18 inches tall without his hat, and Bullseye looks to be just over half that to the shoulder, so I’ll say 8 inches. A quarter horse (as cowboys would’ve ridden) typically stood at 14-2 to 17 hands tall to the shoulder (56 to 68 inches), but even if scaled-up Bullseye is the shortest possible, this scale would make real-person Woody well over nine feet tall. As this seems unlikely, I’ll take scaled-up Bullseye’s height to the shoulder to be 1 metre for convenience, making scaled-up Bullseye 4.92 times bigger than toy Bullseye.
Jet airliners typically take off at speed of 150-177mph (I was going to use a Boeing 767-300F as the plane, but wasn’t able to find a takeoff speed). The plane in the movie takes off not long after Bullseye stops, so I’ll say it was moving at 140mph. Scaled-up Bullseye, therefore, could run at 140*4.92=689mph. For reference, the speed of sound at sea level is 767mph. Transonic horse. How about that.

crystals148 Report

#46

How Much Was This Ramen Actually Worth?

How Much Was This Ramen Actually Worth?

This is from a previous post and user u/srappe:
Given a standard 53' trailer:
According to http://www.wbmcguire.com/links/Guides/TruckTrailerGuide.pdf, A 53' trailer has interior dimensions of 47'6" x 98.5" x 107.375" and a capacity of 3,489 cubic feet.
A 24 ct. box of Ramen Noodles has dimensions of 15" x 12" x 12" or a volume of 1.25 cubic feet.
u/Goldencaramel pointed out that I need to take in account for the pallets.
Pallets are 40" x 48" x 5" roughly. If the floor of the trailer has dimensions as listed above, you can fit 14 pallets lengthwise, and 2 width-wise. On the pallet itself, you can stack roughly 3 boxes of Ramen width-wise (40/12 = 3.33), 3 length-wise (48/15 = 3.2), and 4 height wise in order to be able to stack 2 pallets high in the truck (4*12 = 48). This gives the pallet, with the product a height of 53". Given the height of a trailer is 107.375", you can stack two pallets on top of each other with this packing method.
Therefore, you can fit 56 (14 x 2 x 2) pallets, each carrying 36 (3 x 3 x 4) boxes of Ramen into the truck
This means the maximum number of 24 ct. boxes of Ramen you can fit in a 53' trailer with pallets is 2016 (56 x 36)
These boxes sell at ~$12 at my local BJ's which means that the trailer would have a consumer value of about $24,192 (2016 * $12)
Now according to several people, you wouldn't stack pallets containing a product so fragile on top of one another. Also, according to a fellow freight broker, you can only fit 26 pallets in a trailer.
Re-do the math for a more "real-world" cost estimate and you come out to:
2636$12 = $11,232

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#47

How Many Stones Would Real Buzz Need To Use For His Message To Actually Be Seen?

How Many Stones Would Real Buzz Need To Use For His Message To Actually Be Seen?

Assuming a very basic font of 3x5 pixels, the real Buzz can spell HELP in all caps with 7+11+7+10 (35) square pixels’ worth of stones. Double that in each direction so LRO can see it and you have 140 square meters of stones.
Supposing he has access to stones of about half a meter each in diameter, that would be about 560 stones.

Kane_richards Report

#48

How Much A Retweet Cost

How Much A Retweet Cost

phyneex Report

#49

How Big A Hot Air Balloon Would Need To Be To Hoist A Normal Person Like In The Image?

How Big A Hot Air Balloon Would Need To Be To Hoist A Normal Person Like In The Image?

With air at 100C in the ballon and airdensity normal 1.2kg/m3 And at 100C 0.93 kg/m3
That gets us to 0.27 kg carried by 1 m3 Average human 80kg =ballonsize 80/0.27=296,3 m3
So about 300 cubic meters per person...

HushZero Report

#50

How Many Years Until His Forehead Reaches Space

How Many Years Until His Forehead Reaches Space

Space is 62miles above earth.
62 miles = 3,928,320 inches
In 20 years, his forehead grew 4 inches. That’s .2 inches a year.
It would take 19,641,600 years to reach space.

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#51

Got Banned For Doing The Math On R/Conservative

Got Banned For Doing The Math On R/Conservative

Kryxan Report

#52

How Much Cheese Would This Waitress Have Gone Through?

How Much Cheese Would This Waitress Have Gone Through?

It takes two minutes to grate 227g of cheese. That's 6.81kg of cheese per hour - that is, 88.53kg or 195.18lbs of cheese on Mr. Delanche's plate.

RaspberryNarwhal Report