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We might act like Muppets sometimes, but we’re nowhere near as good at counting as Count von Count. One! Two! Three! Hahaha. And that’s more or less where our worldly wisdom with numbers ends.

(Un)fortunately, we’re not the only ones whose brains sometimes derp out and throw their math skills out of whack! And that’s what the ‘They didn’t do the math’ subreddit is all about. It documents all of the biggest math fails on the net and all of the times people messed up when doing school-level counting. (Just remember not to mix this community up with its counterpart, the ‘They did the math’ subreddit.)

Check out some of the funniest ‘They didn’t do the math posts’ and upvote your fave pics by giving them a big old upvote. Do you have any embarrassing math fails to share with all the other Pandas? Drop us a comment below. Who said that math can’t be fun?!

#3

A Penny A Day For A Year Will Get You Nowhere

A Penny A Day For A Year Will Get You Nowhere

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

I know how the guy/girl thought it was 9,125 dollars with the quarter. Because he probably did 25x365 and not 0.25x365

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The subreddit has over 24.3k members and has been active for 6 and a half years at the time of writing. And the community is all about making your inner numbers’ wiz groan and cringe. There’s nothing like feeling like a genius at math when you compare yourself to the worst of the worst, is there?

But suppose that being better than the worst isn’t enough for you. You like a challenge. You enjoy improving yourself. Pushing past your limits. You’re a Panda, after all! Luckily, there are countless (pun not intended) free and paid resources online to help you sharpen your skills with numbers. From big names like Khan Academy to small scale websites and projects that you’ll find hiding in the cracks of the internet, right in-between posts about cats.

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While some peeps have an easier time learning math, I sincerely believe that everyone can reach the genius tier if they put in enough time, effort, and focus. I for one was really awesome at math when I started school (multiplying stuff was my bread and butter). However, I started struggling when they started throwing in letters and weird concepts into my calculations. I’m sure that more than one of you has been there, dear Readers.

But one thing that I learned was how much carving out an hour or two for practicing basic math problems helped me out. That and knowing some amazing math wizards who explain to you the illogical logic behind numbers. TL;DR—practice makes perfect and soon enough you’ll be a Muppet like Count von Count.

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#9

Ah Yes, Calculation

Ah Yes, Calculation

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

Well, if he sleeps just three hours less, then it means he can drive for 27 hours per day...

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#11

What A Genius

What A Genius

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iajdini avatar
Bardhi's Dad
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I'm sure he is not trolling, so it means that the second solution is correct

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#14

Yep

Yep

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

Yes. And one kilogram of feathers weights more than one kilogram of rocks, as we all discussed when we were six years old. Besides: who would like a shiny bullet proof vest?

christianbradshaw_1 avatar
Christian Bradshaw
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Also, diamond would isn't very tough. It's hard, but would shatter under the impact of the bullet, and the shards would impale the wearer. Game Theory did a video on it. To help, here's an analogy: Take a glass bottle, and a plastic bottle. The glass bottle is harder, yes? You can squeeze the plastic, but the glass remains firm. Now, throw both bottles at a wall. Which will break? The glass, since it's not as tough. The plastic is tougher than the glass, but not as hard.

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

I watched that video! It explained how diamond could shatter if you hit it at a tree because it had a low toughness. Iron is optimum and preferable because of its high toughness and hardness, while gold was correctly depicted as a really bad material for tools or armour.

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peterkelly_1 avatar
Peter Kelly
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Could this exchange be any more wrong? Diamond is not a metal, its hardness is not related to impact resistance (even if you could create a continuous sheet), and I have no idea what the anonymous person was thinking (a carat weighs about 0.2g and the density is about 5 times that of water).

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

Second guy failed math but first guy failed chemistry. Diamonds are carbon not metal.

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

yes because law enforcement agencies will be able to afford all those diamond bullet proof vests....

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

I am more wondering about diamond being a metal

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

Which is heavier . . . A pound of diamonds or a pound of feathers?

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

Sometimes a stupid reply to a stupid statement sounds like an intentional joke.

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

Y'all realize that this post is perfect trolling as it's from 4c... ahh whatever. The less you know, the better you sleep.

dks001 avatar
DKS 001
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Diamond fashion - bullet proof suit. If you have that kind of money, that is. http://www.dudeiwantthat.com/style/clothing/diamond-armor-32-million-bulletproof-suit.asp

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

He just discovered a way to create a black hole on earth.

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Gabriel
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is both chemistry and math fail, every time someone says diamond is a metal ascience book burns

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

hmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm where have i heard this before: is one pound of feathers lighter than one pound of bricks? i should think not but one pound of zippo sure is a little lighter

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Aarohan Jai Anand
Community Member
3 years ago

This comment has been deleted.

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

Where are these people getting their education? And, they're breeding. . . this is scary!

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

hahahahahahahhahhaaaa oh my. People really think this way? I mean there are some puzzlers out there that once you know the answer you kick yourself because it's so obvious, but this is just... I mean... Do people really think this way???

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

So, which is heavier? A pound of feathers or a pound of lead?

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

Ah, the old Moron vs Science saga!!! Last I checked Diamonds weren't metal, either.

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

omg - might also be a tad expensive to use diamonds don't ya think

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

Brittleness, you can't scratch diamond but a single smack with hammer will shatter it easily

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

This one is interesting. Where to start? The idea of bulletproof diamonds? the diamonds being a metal? the heavyness of disproportionate weight? And finally, 15 grams of what??? Such suspense...

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

nobody anoyed about the "hardest metal" part ... metal, it's carbon, pure carbon ... sorry, had to say it

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Grumble O'Pug
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

When you not only don’t know what you ate talking about, but bray it to the world

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

everything about this is just wrong. Diamonds are not metal, 1g does not = 15 g, and the answer is HAVE YOU SEEN HOS MUCH DIAMONDS COST???? THEY ARE A PRECIOUS JEWEL.

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

Once again, Britain's stupid gets upstaged by good old-fashioned American stupidity.

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

The second guy COULD be technically correct if he means the volume of diamond equals so much weight, but it just sounds stupid the way he phrased it. A pound of feathers may weigh as much as a pound of lead, but a cup of lead is always heavier than a cup of feathers, so to speak

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

next thing they say is that they know this because they have a masters degree

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#17

Yay! We All Win

Yay! We All Win

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

It's scary when they double down and try to explain how they are right lol

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#19

How Many Trips Back To The Store?

How Many Trips Back To The Store?

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#20

Ah Yes, The 500 People Population Of The U. S.

Ah Yes, The 500 People Population Of The U. S.

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#21

Once A Day For Whole Year

Once A Day For Whole Year

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#24

For The 0.01th Time?

For The 0.01th Time?

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

And even the testing math is not true, as positive rates do not simply scale with the number of tests but are dependent on many factors.

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#25

Hmm...

Hmm...

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#26

How Do I Take Advantage Of This Special?

How Do I Take Advantage Of This Special?

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#27

When Did Free Become So Expensive?

When Did Free Become So Expensive?

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#28

Please Explain... Yes...

Please Explain... Yes...

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#29

Only 4% Of The People Wash Their Hands?

Only 4% Of The People Wash Their Hands?

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

I still hope the numbers by CDC are wrong. Such a low percentage sounds outright disgusting.

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#30

Communicative Property Is Anger

Communicative Property Is Anger

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#32

Valentine's Day Instant Baby Or That Elusive 4th Trimester Pregnancy

Valentine's Day Instant Baby Or That Elusive 4th Trimester Pregnancy

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bryguy369 avatar
bryguy
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Anyone who puts "lmfao" after every sentence immediately goes down 100 IQ

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#33

Abc Did Not Do The Math

Abc Did Not Do The Math

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Alex Fierro
Community Member
3 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I'm guessing you could pick more than one option in the survey? It would make sense if the graph wasn't a pie chart

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#34

Social Distancing

Social Distancing

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#35

Wow! What A Great Deal!.....wait....

Wow! What A Great Deal!.....wait....

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#36

Pemdas

Pemdas

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#38

Shouldn't A Vp At A Mortgage Company Understand How Compounding Interest Works?

Shouldn't A Vp At A Mortgage Company Understand How Compounding Interest Works?

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#39

Oof

Oof

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

can someone,,, explain what is going on here??? like, I get it, but I also don't - obviously it's wrong but where is the error?

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#40

Off By 100x. Still Way Too High But Holy Crap How Do You Mess This Up?

Off By 100x. Still Way Too High But Holy Crap How Do You Mess This Up?

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Note: this post originally had 89 images. It’s been shortened to the top 40 images based on user votes.

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