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 Haircuts
Image credits: Caamsworth
#2 So, About All Those "Lazy, Entitled" Millenials...
Image credits: arrybfg
#3 Triganarchy
Image credits: katsumiblisk
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.
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..?
Image credits: Vqhr
#5 When Your Barber Doesn't Study Math
Image credits: gryffin__dork
#6 A Whale Died With 64 Lbs Of Plastic In Its Stomach
Image credits: misSxWartooth
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 Smart Did It As A Comeback
Image credits: Vinccool96
#8 Bezos vs. Metallica
Image credits: emissaryofwinds
#9 Lads Lads Lads
Image credits: matt-rhyssmith1
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 Sonic The Mass Baby Murderer
Image credits: Bennyboy1337
#11 "Do You Think I Have Peed 1 Million Times In My Life?"
Image credits: CowboyState
#12 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.
Image credits: Zbox01
#13 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.
Image credits: Kane_richards
#14 Super Soaker Math
Image credits: 7olenge
#15 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.
Image credits: lts_LlT
#16 The Number Of Plants Needed To Replace The Oxygen You Waste
Image credits: bthnp
#17 The Force Of A Carrot Falling At Terminal Velocity
Image credits: Leugim7734
#18 The Turtle Is Faster
Image credits: Fatsodaisy29
#19 Pineapples
Image credits: rogercoutts2
#20 Jasmine And Aladdin
Image credits: InnocuousCyanide
#21 Spongebob Lowkey Ripped
Image credits: koopasrock
#22 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.
Image credits: ChessieDog
#23 Powering The World With Solar Panels
Image credits: KarlGustavderUnspak
#24 Got Banned For Doing The Math On R/Conservative
Image credits: Kryxan
#25 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
Image credits: Unknown_legend34
#26 Spongebob Goes Hard
Image credits: dottie-swaan
#27 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…).
Image credits: toommy_mac
#28 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
Image credits: theblackjesus666
#29 Serving Up Some Math To A Twitter Hypocrite
Image credits: BehindMySarcasm
#30 Discussing Bright With A Friend
Image credits: kokopelliman
#31 The Price Of Wings
Image credits: LivingRaccoon
#32 Swimming In PUBG Is Faster Than Michael Phelps
Image credits: shortdwarf
#33 Math Break
Image credits: Galeaf_13
#34 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.
Image credits: live4lifelegit
#35 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.
Image credits: crystals148
#36 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.
Image credits: Fuckretails
#37 That’s A Lot Of Trees
Image credits: Lefty21
#38 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.
Image credits: xinxilope
#39 What Would The WiFi Password Be?
π.
Image credits: plznotmesir
#40 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.
Image credits: StickBreightley
#41 Gasoline
Image credits: lasssdi
#42 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.
Image credits: RaspberryNarwhal
#43 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
Image credits: armsofasquid
#44 How Much A Retweet Cost
Image credits: phyneex
#45 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.
Image credits: alexishdez_lmL
#46 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.
Image credits: Mrlagalot
#47 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.
Image credits: doctorqwill
#48 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...
Image credits: HushZero
#49 The One Time I Was Actually Intrigued On Doing The Math Myself
Image credits: reddit.com
#50 How Much Was This Ramen Actually Worth?
Given a standard 53' trailer:
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.
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
Image credits: reddit.com
#51 1 In 12 Chance Of Dying In Office
Image credits: JPL7
#52 Have I Eaten A Full Cow?
Image credits: ZylkaLeftridge
#53 Futurama Does The Math
Image credits: poliscijunki
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