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1%% Trope was declared Administrivia/NoRealLifeExamplesPlease via crowner by the Real Life Maintenance thread: https://tvtropes.org/pmwiki/crowner.php?crowner_id=g3b7mhvj
2%% Image and caption selected per Image Pickin' thread: https://tvtropes.org/pmwiki/posts.php?discussion=1330852481081235400
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4%%
5[[quoteright:350:[[ComicBook/{{Superman}} https://static.tvtropes.org/pmwiki/pub/images/writers_cannot_do_math.jpg]]]]
6[[caption-width-right:350:In "[[NewPowersAsThePlotDemands Super-Mathematics]]" it ''may'' be [[MisplacedADecimalPoint 32,000]].\
7But in actual mathematics, it's 3,200.[[note]]Assuming the rounding was even correct...[[/note]]]]
8
9->''"Up in the sky, the alien mother ship sent down twenty hundred troops, three in each space jet.\
10And if you want to know how many jets there were,'' you ''can do the math yourself. I'm a very busy writer trying to make a movie here."''
11-->-- ''Fanfic/CalvinAndHobbesIILostAtSea'' (a ScriptFic that imitates a movie)[[note]][[DontExplainTheJoke 2000 is not evenly divisible into 3.]][[/note]]
12%%
13%% One quote is sufficient. Please place additional entries on the quotes tab. Thank you.
14
15You're watching a show or movie, or reading a book, when suddenly something numerical -- like a date or a sum or a character's age -- jumps out at you as being "off". Your brow furrows. What on earth? You start adding things up on your fingers to check. That wasn't right!
16
17You have just discovered the fundamental truth: that your favorite author failed irredeemably at high school UsefulNotes/{{mathematics}} and never wants to see a number ever again except in the corner of a page.
18
19This is a particular kind of continuity error that can come from multiple writers not checking with each other, or screwups in the timeline.
20
21Frequently causes headaches for power scalers. "Power scaling" is the process of applying real world mathematics to things done by a character to establish some objective criteria for how they would fare in a fight against characters from other works (ie [[Anime/DragonBallZ Goku]] can blow up planets with ease and can shrug off blows from people who could do the same. So it's probably safe to say he could beat [[WesternAnimation/TheSimpsons Homer Simpson]] in a fight). However, often writers will have characters do things without thinking about how powerful someone would need to be to do this in real life, and accidentally making the character far more powerful than they ever intended.
22
23Compare SoapOperaRapidAgingSyndrome, NotAllowedToGrowUp, and LongestPregnancyEver, where the writers ''can'' do math -- they're just intentionally fudging it. See also SciFiWritersHaveNoSenseOfScale and NotDrawnToScale. Possibly the root cause of EverybodyHatesMathematics. Might even involve EEqualsMCHammer. ArtisticLicenseStatistics is a subtrope.
24
25A natural habitat of the MST3KMantra and FanWank, as in many cases these errors are not important to the plot ([[AnthropicPrinciple even when they are]]).
26
27Oh, for the examples below that reference the number pi, it is an irrational number — composed of an endless sequence of digits, but the first 16 are 3.141592653589793.
28----
29!!Example subpages:
30[[index]]
31* WritersCannotDoMath/AnimeAndManga
32* WritersCannotDoMath/ComicBooks
33* WritersCannotDoMath/FanWorks
34* [[WritersCannotDoMath/{{Film}} Films]]
35* WritersCannotDoMath/{{Literature}}
36* WritersCannotDoMath/LiveActionTV
37* WritersCannotDoMath/TabletopGames
38* WritersCannotDoMath/VideoGames
39* WritersCannotDoMath/WesternAnimation
40[[/index]]
41
42!!Other examples:
43[[foldercontrol]]
44[[folder:Comic Strips]]
45* ''ComicStrip/DickTracy'':
46** The story "The Man of a Million Faces" features a string of bank robberies committed by celebrity lookalikes -- or is it a single master of disguise? The story makes a big deal of using known heights of objects to measure (they mean "calculate") the perpetrator's height, which turns out to be a consistent 5'11". Yet a previous diagram shows a line labeled 69.9" (just shy of 5'10") going over his head with room to spare.
47** Another story involves thieves stealing small-valued coins from parking meters. Now, $2 in nickels is only 40 coins, far less than the large handful shown, whereas when Larry throws $20 in pennies onto his mother's stomach, the size of the bag pictured is about right, but that would ''seriously'' hurt.
48* ''ComicStrip/ForBetterOrForWorse'': Due to the massive cast, some of the supporting cast’s ages got fudged up:
49** Gordon Mayes, who is a year older than Michael suddenly went from looking like a typical twenty something to more closer to the middle aged John and Elly, alongside his wife Tracey.
50** Jesse went from an elementary school aged boy to a teenager seemly overnight during Elizabeth’s time in Migwaki.
51** Francoise Caine was a toddler (later preschooler) but acted like she was in grade school.
52** Robin was a few months older than Francoise, but in contrast to her acting like a ten year old, he still acted like a baby.
53[[/folder]]
54
55[[folder:Magazines]]
56* ''Magazine/{{MAD}}''. The ''Film/{{Ghostbusters|1984}}'' parody, "Ghost-Dusters," (''MAD'' #253) featured the characters explaining the $10,000 charge for capturing the parody's equivalent of Slimer. The individual prices actually totaled $11,000. A reader wrote in and the magazine had to admit its error.
57[[/folder]]
58
59[[folder:Music]]
60* The song/story "A Billion Baseballs" by the Green Chili Jam Band does multiple calculations related to these baseballs and gets almost all of them wrong. For example, it says that this many baseballs placed on the ground would take up a giant square "eighty miles around." Since baseballs are three-inch diameter objects, a square of 31,623 by 31,623 baseballs would have a perimeter of under six miles.
61* Foxy Brown's verse on The Firm's "Affirmative Action" contains this horrible bit of addition:
62-->We gotta flee to Panama, but wait it's half-and-half\
63Keys is one and two-fifth, so how we flip\
64Thirty-two grams raw, chop it in half, get sixteen, double it times three\
65We got forty-eight, which mean a whole lot of cream\
66Divide the profit by four, subtract it by eight\
67We back to sixteen, now add the other two that 'Mega bringin' through\
68So let's see, if we flip this other key\
69Then that's more for me, mad coke and mad leak\
70Plus a five hundred, cut in half is two-fifty\
71Now triple that times three, we got three-quarters of another ki
72* The Music/RageAgainstTheMachine track "Down Rodeo" includes the classic hook: ''So now I'm rollin' down Rodeo with a shotgun / These people ain't seen a brown-skinned man / since their grandparents bought one.'' Even if the song is describing a 1960s Black Panther, which the lyrics seem to suggest, that's over a century since the end of slavery, making it extremely unlikely that anyone there would have been old enough to see one purchased. That lyric is obviously not meant to be taken literally.
73* "The Doctor's Wife" by Music/TheClockworkQuartet magnificently details an ApocalypticLog by a doctor obsessed with curing his wife of a serious illness. The only trouble is, the dates at the beginning of each verse conform to no known calendar.
74* "Year 3000" by the Music/{{Busted}} claims the narrator visited the titular year and "Your great-great-great granddaughter" is doing all right by that time. Assuming an average generation is 30 years, they're about 27 "greats" off [[note]] In 2003, when the song was released, they would have been 997 years removed from the year 3000, or 33.23 30-year generations. Even with variances one way or another, that's way too many generations for a great-great-great grandchild to be alive to see.[[/note]]--she'd either be mummified or only kept alive as an AI by that point.
75* In the Vietnam War protest song "I Was Only 19" by Redgum is the line ''And Frankie kicked a mine the day that mankind kicked the moon / God help him, he was going home in June'' which implies that Frankie was about to go home when he was killed by a mine. But the moon landing didn't happen until July - which would mean Frankie still had almost an entire year of service to go.
76* In the Music/SpiritOfTheWest song "The Crawl", there are eight "good old boys" at the beginning of the pub crawl, but "half" of them are left behind along the way, resulting in only three of them making it to the end. Sometimes, in concert, they fixed this division error by having them start with six instead of eight.
77* Music/Deadmau5' 2010 album is titled ''4x4=12''. This was originally an in-joke from the livestreams he held with fans, where in the middle of describing his setup, he erroneously believed that to be the case, [[AscendedMeme turning into a meme that he chose to ascend for his next album]]. He would also poke at this from the track "Maths" off his following album, ''> album title goes here <'', [[BrickJoke which contains the lyrics]] "Four plus four plus four is twelve, twelve plus twelve plus twelve is four [...] Twelve plus twelve plus twelve is ''incorrect''".
78[[/folder]]
79
80[[folder:Mythology & Religion]]
81* The people of the northern [[Literature/TheBible Kingdom of Israel]], who were scattered by the Assyrians and disappear from the historical record after that, are popularly known as the "Ten Lost Tribes." The only problem is that the Northern Kingdom consisted of only ''nine'' tribes -- Reuben, Issachar, Zebulun, Dan, Naphtali, Gad, Asher, Ephraim, and Manasseh. The most likely explanation is that somebody subtracted the two tribes of the Southern Kingdom, Judah, and Benjamin, from the traditional twelve without realizing that the tribe of Simeon had disappeared from the census at this point; and the priestly tribe of Levi (which by law had no land holdings) was spread out through both kingdoms. The math was always a bit fuzzy anyway since Ephraim and Manasseh were actually ''half''-tribes (being descended from Joseph's two sons) and the other tribes would sometimes kick Dan off the list for its wickedness (having slaughtered and resettled in a defenseless town in the Literature/BookOfJudges).
82* In the Bible, a temple includes a sea (large bowl) of "cast metal, circular in shape, measuring ten cubits from rim to rim and five cubits high. It took a line of thirty cubits to measure around it", implying that pi is equal to 3 and not 3.14159. However, the sea is also mentioned as being a "handbreadth" thick. Taking the thickness of the sea into account, [[http://www.purplemath.com/modules/bibleval.htm the numbers match quite accurately.]] One might also note that ten and thirty are numbers with but one significant figure, and any computation using them is only good to one figure as well.
83** Near the end of the Literature/BookOfGenesis, Jacob's descendants are listed and counted as they move to Egypt. They equal 70 souls in total... except that only 69 are named. The inconsistency is specifically with Leah's children, where 32 are listed but the narrative counts 33. One possible explanation: Levi's daughter Jochebed[[note]]most notable for being the mother of Moses, Aaron and Miriam[[/note]] is the only grandchild of Jacob mentioned who was born ''after'' they arrive in Egypt. According to Jewish tradition, she makes the count because her mother was already pregnant with her when they traveled.
84* According to some sources, Iphigenia was twelve when the Trojan War started. The problem with this is her aunt Helen of Sparta was said to be twelve when Theseus abducted her near the end of his reign and according to Castor of Rhodes that ended in 1205 BC, meaning Helen and her siblings Clytemnestra (Iphigenia's mother), Castor and Polydeuces would have been born in 1217 BC. The traditional date for the beginning of the Trojan War was 1194 BC, putting Iphigenia's date of birth in 1206, a year before Theseus' abduction of Helen, which was before Helen was married to Menelaus and Clytemnestra was given to Agamemnon.
85[[/folder]]
86
87[[folder:Professional Wrestling]]
88* Wrestling/ScottSteiner's infamous promo for a match against Wrestling/SamoaJoe and Wrestling/KurtAngle in [[Wrestling/ImpactWrestling TNA]]:
89-->''"You know they say all men are created equal, but you look at me and you look at Wrestling/SamoaJoe and you can see that statement is NOT TRUE! See, normally if you go one-on-one with another wrestler you got a fifty/fifty chance of winning. But I'm a genetic freak, and I'm not normal! So you got a 25 percent at best at beating me! And then you add Wrestling/KurtAngle to the mix? You-the chances of winning drastically go down. See, the 3-Way at Sacrifice, you got a 33 and a third chance of winning. But I! I got a 66 and two-thirds chance of winning, cuz Kurt Angle KNOOOWS he can't beat me, and he's not even gonna try. So, Samoa Joe, you take your thirty-three and a third chance minus my twenty-five percent chance (if we was to go one on one) and you got an eight and a third chance of winning at Sacrifice. But then you take my 75 perchance-chance of winnin' (if we was to go one on one), and then add 66 and two thirds…percents, I got a 141 2/3 chance of winning at Sacrifice! Señor Joe? The numbers don't lie, and they spell disaster for you at Sacrifice!"''
90** Astonishingly, perhaps, ''arithmetically'' Steiner's numbers do all add up. It's just that chance doesn't work like that.[[note]]And, naturally, Samoa Joe won...[[/note]]
91* January 4, 2010 was the beginning of TNA's failed attempt at a second Wrestling/MondayNightWars against ''Wrestling/{{WWERAW}}''. That night, ''Raw'' drew a 3.6 rating and ''TNA Impact'' drew a 1.5. Wrestling/VinceRusso wrote on his blog:
92-->"The bottom line is- TNA WON. PERIOD."
93* ''Wrestling/WrestleMania'':
94** When promoting the milestone that was ''[=WrestleMania=] XXV'', Wrestling/{{WWE}} would insistently refer to the event as "The 25th Anniversary of ''[=WrestleMania=]''" -- forgetting that the number doesn't actually indicate how many years it's been since the first one. ''[=WrestleMania=] XXV'' wasn't actually the 25th '''anniversary''' of the first ''[=WrestleMania=]'', it was the ''24th''. If you wanted to mark the 25-year anniversary of ''[=WrestleMania=] I'', you had to wait until ''[=WrestleMania=] XXVI''.
95** When Wrestling/TheUndertaker was set to face Wrestling/TripleH at ''[=WrestleMania=] XXVII'', they pretended that the two men had never wrestled before. 'Taker said that he had "beaten 19 men" at ''[=WrestleMania=]'', which, even ignoring that one of those was Triple H himself, did not account for the fact he had faced Wrestling/{{Kane}} and Wrestling/ShawnMichaels twice each. In a promo before the second time he faced Michaels, the previous year, he had said "18 men have come..." -- which ''did'' at least balance out up until then, as his two matches against Kane were countered by the fact that one of his other matches was a two-on-one handicap.
96[[/folder]]
97
98[[folder:Theatre]]
99* ''Theatre/ThePhantomOfTheOpera'' takes place in 1881. Its sequel, ''Theatre/LoveNeverDies'', takes place ten years later, in 1907. ''Phantom'' itself has had its share of chronology issues -- the dates of the prologue, the principal action, and the death of Christine's father have shifted several times since the show's inception, and trying to reconcile all three dates with each other has resulted in headaches for many a phan. A brief discussion on the subject can be found [[http://www.phantomoftheopera.com/modules/article/view.article.php/c6/11 here]].
100* ''Theatre/ThePajamaGame'' has a song named "Seven and a Half Cents" involving the singers detailing what they could buy with that raise over a given number of years. In each calculation, they multiply by [[https://www.reddit.com/r/askmath/comments/iqjq7c/where_did_the_pajama_games_math_go_wrong/ two and a half hours of overtime]] instead of two and a quarter, resulting in the wrong answer every time.
101* ''Theatre/{{Hairspray}}'', the stage adaptation of the 1988 film of the same name, starts on a Monday in "early June", 1961. It ends on June 6th, 1961. However, around 10 days pass between the beginning and ending scenes. This problem is compounded by the fact that the first Monday in June 1961, was the 4th.
102* In ''Theatre/FiddlerOnTheRoof'' after a TimeSkip, Tevye says Tzeitel and Motel have been married for two months. A scene or two later (with no time skip), they have a baby. Either Tzeitel had the world's shortest pregnancy or she somehow had no full belly when she was seven months pregnant at her wedding.
103* ''Theatre/CharlieAndTheChocolateFactory'' falls afoul of this in Act One with regards to Veruca Salt finding her Golden Ticket. In the IAmSong "When Veruca Says" her father claims that his workers were "shelling" Wonka Bars "for forty days and forty nights", but the contest was only announced the previous day. (Granted, it might have ''felt'' that way since they're dealing with [[SpoiledBrat Veruca Salt]] here.) This might be a matter of the book and the lyrics being penned by different writers.
104[[/folder]]
105
106[[folder:Toys]]
107* ''Toys/{{Bionicle}}'' has this across its multiple forms of media.
108** The size of the Great Spirit Robot was increased from its originally intended height (about a small-to-middle sized continent) to roughly the diameter of Earth without other measurements being changed accordingly. This means the Denmark-sized island that was supposed to be covering the fallen robot's head wouldn't have fit.
109** Practically all forms of media disregard any given measurements about the sizes and population numbers of cities or villages. In early media, the giant island Mata Nui had less than a hundred denizens living in tiny villages. When the series was adapted into movies, the number was boosted to several hundred for dramatic purposes with no in-universe justification. The second film, a prequel, not only showed but clearly stated that the true number was several thousand, yet offered no explanation for why thousands later became hundreds. The writers were actually aware of these discrepancies, but their retroactive solution was to cap off the population number at one thousand, plus a small group of leaders and protectors. This was arguably the worst solution, as it contradicted every single piece of prior media, along with common sense. Early media explicitly said many islanders have died over the ages, which could have given some excuse for the inconsistent numbers, but this plot point was {{retcon}}ned, effectively meaning that the writers deliberately made their math even worse.
110** Related to the population number madness, it was also stated that there were 5,000 Vahki police robots watching over the people, effectively meaning that there were five large, highly efficient enforcer units for every single meager worker, which in no way adds up. Takua was even considered a weirdo for being so reckless and lazy that he had an entire Vahki squad assigned to watch him, but with a ratio of 5 Vahki for every person, his predicament doesn't sound too strange at all.
111** Water began pouring into the massive cavern Karda Nui through an island-sized hole, which under a thousand years only managed to flood its bottom. While Karda Nui is a gigantic place and its sizes can only be guessed at by comparing different pieces of concept art, fans have calculated that even under the most lenient of circumstances, the place would have been filled with water in a matter of weeks.
112** The franchise had issues with time scaling too. Sometimes creatures or characters who were a couple thousand years old were considered ancient and among the oldest ever. Yet in other parts of the story, hundred thousand year olds were said to be "young" and inexperienced. At one point, The Shadowed One [[RapidAging rapid-ages]] 3,000 years and becomes frail and decrepit. Later on he and practically everyone else is revealed to be 100,000 years old, so an added couple thousand should really be nothing. Characters routinely talk of thousand year old objects or events as belonging to ancient, forgotten times that are only recorded in legend, though realistically they should all clearly remember them as they were alive at the time.
113[[/folder]]
114
115[[folder:Visual Novels]]
116* ''VisualNovel/{{Narcissu}}'' and its sequel, ''Narcissu ~ Side 2nd'', have trouble keeping Setsumi's age straight. In ''Side 2nd'' (which takes place during the summer of 1999), Setsumi is referred to as being an Aquarius (thus born in late January or February), and it is alternatively claimed that she is fifteen years old, or that it is her fifteenth summer (which would make her fourteen). The original game (taking place in late January and early February of 2005) claims that she is 22, but adding the years up from her claimed age in ''Side 2nd'' indicate that she should be within a month of either her 20th or 21st birthday, depending on whether one uses the "15th Summer" claim or the "15 years old" claim. Also, in the prologue of ''Side 2nd'' (which takes place between the two stories), Setsumi makes a remark about how she's been hospitalized on and off for a decade. The main story indicates that she was first hospitalized sometime in April 1997, thus making it impossible for the claim of a decade to be correct.
117* In ''VisualNovel/HigurashiWhenTheyCry'', Hinamizawa has a population of roughly 2000, yet there are only 20 pupils in the village's only school. Realistically, around one ''tenth'' of a population would be of school age. (The TIPS say that half the children in the village go to school in Okinomiya instead, which helps a little, but isn't nearly enough.)
118* Early into ''VisualNovel/Danganronpa2GoodbyeDespair'', Monokuma reveals that [[spoiler:the students lost two years of their memories]]. If one, however, factors in all the cumulative time periods, the gap is likely around three and a half years. [[labelnote:Explanation (spoilers)]]These students were a year ahead of [[VisualNovel/DanganronpaTriggerHappyHavoc the students from the first game]], who lost two years of memories. The interquel ''VideoGame/DanganronpaAnotherEpisodeUltraDespairGirls'' is at most six months after the first game, and a few characters from the second game appear, having not yet lost their memories. Add up these timespans and it's around three and a half years of memory loss.[[/labelnote]] Somewhat justified, because giving the real time gap would spoil a major reveal too early into the game and later entries in the series indicate Monokuma is an UnreliableExpositor. %% Namely the Fuyuhiko/Peko height problem. Two years is reasonable, three and a half isn't.
119* Some times in ''Franchise/AceAttorney'' don't match.
120** It's stated multiple times that Phoenix, Edgeworth and Larry all met and became friends in the fourth grade, which was fifteen years before the events of the first game, yet Larry's age is listed as 23 alongside Phoenix and Edgeworth's 24, which would require them to have met in third grade.
121** In the final case of ''Trials and Tribulations'' it is stated that Phoenix dated "Dollie" for 6 months, when it was actually close to 8 months[[labelnote:Dates]]From August 27th to April 11th following year[[/labelnote]]. Corrected in later ports.
122** In ''Apollo Justice'' onward, most of the ''Phoenix Wright''-era cast are a year younger than they should be, because of the botched handling of a time skip. To explain further, the trial of Shadi Enigmar happened seven years prior to the events of ''AJ''. When calculating character ages, the writers counted from the start of ''T&T'' instead of the end of ''T&T''. (Further confusing things, everything still takes place in the year it's supposed to - only the ages are wrong.)
123** [[spoiler:Thalassa Gramarye, Apollo and Trucy's mother,]] is said in ''Apollo Justice'' to be 40, which doing the math means [[spoiler:she had to have left the Troupe, gotten married and had Apollo at just ''18''.]] Given the lack of references to this in dialogue, combined with how old she looks in the photo taken before [[spoiler:Apollo's birth]], this is likely an error.
124** In the second case of ''Spirit of Justice'', it's stated Athena doesn't know who Troupe Gramarye were because she was away overseas in Europe at the time they were active. Troupe Gramarye disbanded a full year and a half before [[spoiler:the murder of Metis Cykes]], and had been active years before then. What makes this strange is that Athena's incredibly sheltered upbringing is more than adequate an explanation for her not knowing about them, making the continuity error completely unnecessary.
125* The ''VisualNovel/ZeroEscape'' trilogy deals with a lot of science and math, both basic and advanced (mostly done by [[BrainyBrunette Akane]]), and most of the time it gets it right, but a few mistakes managed to slip in:
126** At one point in ''VisualNovel/NineHoursNinePersonsNineDoors'' Seven pulls up a theory that the ship they're on is RMS Gigantic (a real-life ship that was later renamed to HMHS Britannic), to which Santa reacts with "There is no way we're on a boat that's almost 100 years old". Gigantic was finished in 1914 and the game takes place in 2027, so if Gigantic still existed it would be ''over'' 100 years old. (The game was ''released'' before 2014; someone probably did the math for PresentDay and forgot the game is actually TwentyMinutesIntoTheFuture.)
127** ''VisualNovel/ZeroTimeDilemma'':
128*** If you fail to get the correct code in the pantry, Carlos will say that a 4 digit-code has "hundreds of thousands of possible combinations". No, it doesn't: it has exactly 10,000 combinations.
129*** Akane claims there is ''over'' a thousand possible combinations for a 3-digit code when it's ''exactly'' one thousand combinations.
130[[/folder]]
131
132[[folder:Web Animation]]
133* ''WebAnimation/OverSimplified'': In the video about Henry VIII, the narrator tells us that the famed English king is born 5 years after his older brother, Arthur. Immediately after this information, we are shown a scene where Henry VII tells a three-year-old Arthur about the ArragedMarriage the young prince is to have with Catherine of Aragon. A young Henry VIII shows up after the conversation between his father and older brother, even though he shouldn't have been born yet if Arthur is only three during the scene.
134[[/folder]]
135
136[[folder:Webcomics]]
137* Averted in ''Webcomic/SchlockMercenary'' [[http://www.schlockmercenary.com/2005-06-04 here]]. The author even accounted for the equal amount of regular matter that would be converted to energy when taking 320 milligrams of anti-matter and converting to the equivalent explosion powered by TNT. ([[http://www.wolframalpha.com/input/?i=13.75+kilotons+of+TNT Quick link to the maths]]). Schlock's [[ViewersAreGeniuses readers]] can do math as well: the writer infamously challenged them to, given a few distantly related numbers, calculate the height of the "Hellavator" lunar space elevator, only for several readers to send in accurate calculations and numbers, and show their work.
138-->[[http://www.schlockmercenary.com/2001-01-23 Schlock fans get an A+. You are all far, far smarter than I gave you credit for.]]
139* ''Webcomic/AngelMoxie'': In-universe example. Grant accidentally fakes his birthdate as 1971, but the date of his teaching degree as 1983. Luckily, the only ones who notice are the heroines.
140* ''Webcomic/RoxanneFromHell'': In a Q&A, Frank's age is given as 80-120ish. Later on, he describes himself as about nine times older than Romero, who is 19; making him about 171 years old.
141[[/folder]]
142
143[[folder:Web Original]]
144* The ''{{Creepypasta}}'' story ''The Russian Sleep Experiment'' starts out with five Nazi prisoners and has three by the time they leave the facility, yet still manages to include death scenes for four or five after that.
145* In ''Fanfic/FarceOfTheThreeKingdoms'', Cao Cao works out that the Ma family's ages make no sense. He is quite disturbed by this.
146* A common internet meme is to take some large amount of money being spent on something (say, $600 million), divide it by the number of people in the United States (at time of writing, a bit over 320 million), and claim it would be more practical to give everyone in the US a life-changing million dollars. But the people making these memes are either bad at math or [[{{Troll}} hoping to mess with such people]], as millions cancel when dividing. Dividing the original amount by the American population would actually give a not-so-life-changing ''couple of bucks'' per person, not a million.
147[[/folder]]
148
149[[folder:Web Videos]]
150* ''WebVideo/TheNostalgiaCritic'', in his ''Film/EndOfDays'' review, as part of a long string of math equations, infamously uttered that "9+9+9=21". That's about as basic of mathematics as one can get and [[TheDitz he screwed it up]]. He later apologized for it in one of his "Fuck ups" specials.
151* Invoked humorously in the ''WebVideo/MonsterFactory'' video "Recreating a Beloved Sitcom in The Sims 4"; Griffin says that the "squared" in the title of the sitcom they've invented, "My Two Dads Squared," comes from the number of fathers [[AdorablyPrecociousChild Daytrader Vader]] has (Dark Vader, Cousin Specialagent, and Griffin himself) because [[BlatantLies "two squared is three."]]
152* ''LetsPlay/MarioPartyTV'': One comment pointed out that Steeler miscalculated the odds during the Pagoda Peak playthrough. The probability of rolling 4 of the same number is not 1/10,000. Since the dice blocks are numbered one to five, and there are 5 possible ways to get all 4 numbers being the same, the probability ends up being: 5/(5^4) = 1/125 (about the same as a golden with 1-10 blocks)
153* Website/YouTube animator Ice Cream Sandwich, in his video [[https://www.youtube.com/watch?v=oKLbOxLJfRg "hurt"]], says that if 6.8 million Americans break a bone each year, and the total population is about 300 million, then about 2/10 Americans break a bone annually. If that sounds high, that's because he's off by an order of magnitude — with those numbers the injury rate would be 0.0226666..., or about 2/100, i.e. 2%. Not 20%.
154* ''WebVideo/ScreenRantPitchMeetings'' often makes fun of these errors in movies.
155** For example, there's the sand path in ''Film/AQuietPlace'', and it's implied that the Screenwriter gravely underestimated how difficult it would make such a path to quietly move into town. The Producer says that filling his kid's sandbox takes 100 pounds of sand, so making a path into town would require literally ''tons'' of sand.
156** For ''Film/HomeAlone2LostInNewYork'', the Screenwriter estimated that New York City is only populated by about 200 people, only to be informed that the actual population is around 7 million at the time the film was made. Kevin's father is furious with him for spending $967 on room service, despite such a cost probably being somewhat negligible for someone who just paid to fly 14 people across the country ''twice'', implying that the Screenwriter doesn't know how much those plane tickets would cost.
157[[/folder]]
158
159----
160->''"80% of you have no understanding of percentages!"''\
161''"We aren't even that many..."''

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