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1%%%%%%% This page has been alphabetized. Please add new examples in the correct order.%%%%%[[WritersCannotDoMath Bad mathematics]] in live-action TV.----* ''Series/TwentyFour'': The first season takes place "two years to the day" after Jack Bauer led a covert strike in Yugoslavia during the 1999 Kosovo War. It is also a presidential election year. [[note]]Presidential elections in USA are held four years apart, and the count started in 1788. You couldn't ''have'' a presidential election in 2001; the writers either missed the 2000 elections or anticipated the 2004 ones. Or, like ''Series/TheWestWing'', ''24'' takes place in an alternate timeline in which the elections occur on a different schedule.[[/note]]* ''Series/ThirtyRock'': Liz somehow turns 35 one year, and 37 the next.* On ''Series/AllMyChildren'', Kendall Hart was introduced in 1993 as Erica Kane's 16-year old daughter, who Erica gave birth to at nearly 15 years old. Erica and her mother, Mona, placed Erica's baby girl for adoption to the Harts. Since the storyline established Kendall as 16, this would've made her mother, Erica, in her early thirties. However, Erica had been older than that for at least a decade. Once the writers were called out on this, they quietly {{Ret Con}}ed Kendall's age from 16 to 22/23 years old some time later -- which was still pushing things, but [[WillingSuspensionOfDisbelief somewhat acceptably so]] (nonetheless, this didn't stop the writers from continuing to write Kendall like a bratty teenager who practically hugged her dolly at night). It also led to the classic example of Inverse Dawson Casting: The change meant that 16-year old Sarah Michelle Gellar was playing a twenty-something. However, all this rapid aging was undone when the character returned to the show in the form of Alicia Minshew six years later and Kendall's birth year was reverted back to what it originally was when she first appeared as a 16-year old girl in 1993.* ''Series/{{Andromeda}}'' once used the term "nano-millennia" to describe how long the ship's AI was trapped in a box. It was apparently meant to convey a great deal of subjective time based on how fast a computer processes things. However, the prefix nano means one billionth. From that, one "nano-millennium" is only about 31.5 seconds.* Ron Moore's [[WatsonianVersusDoylist standard explanation]] for chronological inconsistencies in ''Series/{{Battlestar Galactica|2003}}'' is that he's bad at math.* ''Series/{{Big Bad Beetleborgs}}'': Josh Baldwin only exists because of this trope; the show already had four main characters who were Beetleborg fans and worked at the comic store (Drew, Jo, Roland, and Heather)-exactly one for every main Beetleborg plus the White Blaster. Once the writers realized their mistake, they lampshaded it in the form of Heather's leg getting broken during Shadowborg's initial attack. * ''Series/{{Bones}}'':** In one episode, it's revealed that Brennan had a relationship with her advisor in Chicago when she was 24. In another episode, she's said to have been born in 1976, and been working at the [[FictionalCounterpart Jeffersonian Institute]] since 1998 (when she would have been 21 or 22). In another episode, she talks about identifying bodies after the Branch Davidian siege. Which means that she was at least 23 by 1993.** In another episode, Angela kept asking her co-workers to donate money to save a cute piglet from becoming bacon. She claimed doing this would cost $1500, yet if buying and rearing pigs cost that much, pork would cost a ''lot'' more than it does. A whole pig that's already dead costs [[http://www.obriensfamilyfarm.com/prices.html about half that]].* ''Series/BoyMeetsWorld'' begins in the fall of 1993. Cory is 11 and in 6th grade, his older brother Eric is 15 and in 10th grade, and their little sister Morgan is 5 and in kindergarten. Next year/season, Cory is 12 and in 7th grade, Eric is 16 and in 11th grade, and Morgan is 6 and in 1st grade. So far, so good, right? Not quite. Towards the end of the second season, Cory is suddenly 13 and presumably in 8th grade, considering final exams were taken in a second season episode way before the finale. When the third season begins, Cory and his friends are 14 and in 9th grade, although Eric's aging process is still consistent (17 and in 12th grade). When Morgan suddenly re-appears, she's 8 and in 3rd grade. At the end of the third season, Cory, Shawn, and Topanga end the school year as 15-year-old 10th graders. Eric's age and grade, however, are still consistent (he graduates high school at 18, as he was supposed to). The fourth season begins with Cory, Shawn, and Topanga as 16-year-old 11th graders. Eric is an 18-year-old college reject who's trying to find his place in the world. Morgan's age and grade are ambiguous. The fifth season begins, and the aging process is fluid once again. Cory, Shawn, and Topanga are 17-year-olds in 12th grade, and Eric is a 19-year-old college freshman. Next year/season, Cory, Shawn, Topanga, and (new cast member) Angela are 18-year-old college freshmen, and Eric, Jack, and (new character) Rachel are college sophomores. The year/season after that, however, Eric, Rachel, and Jack are college seniors. Also, at the beginning of the seventh season, Morgan is suddenly thirteen and dating boys.* ''Series/BuffyTheVampireSlayer'': Creator/JossWhedon has stated that he sucks at math. Among other things, Spike has miraculously managed to become younger with each passing season:** In season two, he is stated by Giles to be "barely 200." In season four, Spike tells Willow that he's "only 126." Finally, in season five, the flashback episode "Fool for Love" established Spike as having been changed into a vampire by Drusilla in 1880. As the episode was made in 2000, this would make him 120 in vampire years. We don't know precisely how old he was when he was vamped, but it's more than six and less than eighty.** In Season 1 and 2, Angel is mentioned as being 240 and 241, respectively. Those seasons took place in 1997 and 1998, meaning he was born between 1756-1758 (depending on when his birthday is). However, the flashback in Becoming: Part II shows him being sired by Darla in 1753.** Buffy herself has at least three different birth dates, although this is more about continuity than math. In a season 1 episode, we see her school details on a computer screen, with two different birthdates, in 1979 and 1980 (the screen display changes between cuts). Then her gravestones (in the season 1 Nightmares episode, and at the end of season 5) show her birth date as 1981. Besides this, she also said in a season 4 episode that her astrological sign was Capricorn on the cusp of Aquarius, which puts her birthday on or soon before January 19 (which does not fit either of the season 1 birthdays).** In the third season episode Anne, Buffy is taken into a hell dimension where time passes very swiftly. The demons who run the dimension kidnap people from Los Angeles, and put them to work in the hell dimension. After many decades of work, the workers, aged beyond recognition, are returned to L.A., where they have only been missing for a day or two. We see maybe two dozen human workers in the hell dimension, and if each lasts (generously) about two days objective, the demons have to be kidnapping at least six people a day, and dumping about the same number of bodies. Unless there are multiple feeder sites for the hell dimension, which the evidence in the episode does not support, people are going to notice 6 people a day disappearing, even in L.A.** In season 7, the episode "Conversations With Dead People" dates itself as November 12. The next three episodes each pick up exactly where the last ended, and we only go through a couple of days, yet in the fourth of this series it's suddenly December.** In "After Life" Spike tells Buffy she's been gone 147 days, or about 5 months. In later episodes, however, there are numerous references to her only having been gone about 3 months.* ''Series/Charmed1998''** The show has a demon who appears every [[ArcNumber 1300 years on Friday the 13th (who conveniently shows up in the thirteenth episode of the series, looking to kill thirteen unmarried witches)]]. But in the seventh century AD, when he would have last appeared, our currently-used Gregorian calendar wasn't even a twinkle in Pope Gregory XIII's eye; in fact he wouldn't even be born for another 900 years or so. Was the demon's last appearance on the day that people at the time would have called Friday the 10th, or does he adjust his date of appearance to conform to the currently extant calendar (in which case he could theoretically be beaten by changing to a 31-month calendar in which every month has only twelve days at most)?** The family tree seen in "Pardon My Past" states that the sisters' grandmother was born in 1937 and their mother in 1950 - meaning that Penny somehow had a daughter when she was twelve. There's also the episode "Witchstock" which shows a youthful Penny in 1967 (going by the family tree, that makes her thirty, which is okay) - but "That 70s Episode" showed her looking quite elderly in 1975.** Just narrowly avoided with Leo's past life in the same episode. He's shown to be P. Baxter's lover in the 1920s (or at least Anton pretends to be him) when Leo's birth date is given as 1924. So Leo's past life has to have died and then been reborn pretty quickly. Possible but just barely.** Paige's birthday is listed wrong on her gravestone in the alternate reality of "Centennial Charmed". The same episode hangs a lampshade on another maths related goof; Cole is retconned into turning a hundred, when a Season 3 episode alludes to him being 115. A demon serving his birthday cake says "I thought you were 117" - and gets blown up for it, implying Cole is sensitive about his age.** Penny Halliwell's love life gets forgotten about by the writers. She's been engaged six times and married four. Her first husband was the one shown in Woodstock. Despite the many flashbacks to the sisters' childhoods and teen years, there's never any reference or sight of the five other suitors Penny had.* You think a show that relies so heavily on {{Flashback}}s and [[TimeShiftedActor Time-Shifted Actors]] as ''Series/ColdCase'' would be free of this, right? Wrong! The conflicting data about the age of the most senior detective, Will Jeffries, was eventually {{lampshade|Hanging}}d in sixth season episode "November 22nd":-->'''Will:''' [talking about the day Kennedy was assassinated] I was playing touch football at recess.\'''Scotty:''' Recess? I thought you were, like, forty-five when that happened.\'''Lilly:''' No, you're thinking of when Lincoln was shot.\'''Will:''' Keep it up. See what happens.* ''Series/CriminalMinds'':** In one episode, Aaron Hotchner recollects meeting his wife when she was a tenth grader and he a junior. The impetus for his memory is a yearbook: "Reflections 1987." If Hotch were a seventeen-year-old junior, that would make him born in 1970, and thus approximately 35 at the time of the episode. Previously, viewers were told that Hotch had been a prosecutor before joining the FBI. So, if he graduated high school at eighteen, then college at 22, then law school at 25, and immediately became a prosecutor, then maybe he could join the Bureau at 27. That gives him eight years to not only be promoted to the BAU, but to become the Unit Chief. Considering how hard the BAU is to get into, a fact which the show points out, that seems... unlikely.** A year later, Agent Rossi is introduced. It's said that he last worked for the BAU ten years before, and that Hotch was on the team with him. Meaning that Hotch would have had to join the ''BAU'' at age 27, and thus the FBI itself decidedly earlier, meaning he would have to... oh, we give up.** In a later episode, Hotch's medical chart lists him as being 43, four years older than his yearbook leads us to believe. Or maybe three years older, if it was his ''wife's'' yearbook.* Averted on ''Series/{{CSINY}}'' where the writers realized that making Christine's brother Mac's Marine buddy would not have worked with her being in her 40s. Mac is about 56 and would have been through basic training in the mid 70s, so she'd have been a small child then. They made him a police partner of Mac's instead.* ''Franchise/{{Degrassi}}'', in all its incarnations, is ridiculous when it comes to this:** In the 7th episode of the first season of ''Series/DegrassiJuniorHigh'', Wheels is said to be 14. He has a birthday in the 12th episode of that season. In the first episode of the 3rd season, he is said to be "almost 15", and stays that way until a month after the 11th episode of that season (which was most of a year after the first).** Spike has baby Emma at the end of the second season of ''Series/DegrassiJuniorHigh'', which is the end of grade eight for Spike. So, when Spike graduates, Emma should be approximately four. At Spike's ten-year reunion in the first episode of ''Series/DegrassiTheNextGeneration'', Emma is only twelve. In fact Emma should have been ''five'' when Spike graduates, because of the extra year (below).** In the first episode of ''Series/DegrassiTheNextGeneration'', the class reuniting is said to be the class of '91 -- even though the classes reuniting (yes, there are two classes reuniting for some reason) should be the classes of '92 and '93, respectively. The writers seemed to have based this off when ''Series/DegrassiHigh'' ended, not taking into account that it ended with the characters in years ten and eleven.** At the time the original series was made, Ontario schools had an extra year in the college-preparatory track. This explains why most characters in the "School's Out" special are identified as 19, while [[spoiler: Caitlin]], who graduated a year early, is 18. The writers promptly forget this detail as Spike talks about Emma entering Junior Kindergarten, making her 4 while her mother is 18.** After [[spoiler:J.T.]]'s death, he is said to have been born in 1990, making him sixteen at the oldest. He was in year twelve, in which you are normally seventeen or eighteen.* ''Series/DoctorWho'':** In the first episode of the series (1963's [[Recap/DoctorWhoS1E1AnUnearthlyChild "An Unearthly Child"]]), what is clearly supposed to be the quadratic formula is seen on a chalkboard in the background. However, the denominator is written as 2ab instead of the actual 2a.** In the classic story [[Recap/DoctorWhoS6E2TheMindRobber "The Mind Robber"]], after hearing that a man wrote 5,000 words a week for 25 years, Zoe exclaims "but that's over half a million words." Technically, it is though, by 6 million.** The Doctor's own age, on the rare occasions he mentions it, frequently changes by implausible increments (and at least once went ''down'', between the last time it was mentioned in the classic series and the first time it was mentioned in the revived series). Steven Moffat, the man in charge from 2010, has openly admitted that "in his mind", the Doctor has lost count and says 900 (bumped up to 1200 during the Eleventh Doctor's run) because it sounds coolest. Also from Moffat, "this is a man who logically should have no idea how old he is."--->'''The Doctor:''' Uh, I dunno. I lose track. 1200 and something, I think, unless I'm lying. I can't remember if I'm lying about my age, that's how old I am.*** Bumped up by the Twelfth Doctor to over 2000 ("I'm old enough to be your ''messiah''"); at least this time though we can account for several centuries spent on Trenzalore defending Christmas.** In [[Recap/DoctorWhoS27E8FathersDay "Father's Day"]], Rose travels back to November 1987, where we see her as a baby of about six months old (according to series 2's [[Recap/DoctorWhoS28E5RiseOfTheCybermen "Rise of the Cybermen"]]) except there are repeated references to her being 19 in her first season, which starts in March 2005.*** To explain: If Rose is 19 in March 2005, then she must have been born between March 1984 and March 1985. If her father died in November 1987, then she ''should'' be a toddler aged either two or three. If her father died when she was six months old, than he should have died between September 1984 and September 1985. Rose being six months old in November 1987 would mean she was born in May 1987 and make her 17 and two months away from her 18[-[[superscript:th]]-] birthday in March 2005.** In a kind of cross between this and ArtisticLicensePhysics, in [[Recap/DoctorWho2005CSTheChristmasInvasion "The Christmas Invasion"]], the Doctor's hand gets cut off. He can still regenerate it though, because he's still within the first fifteen hours of his regeneration cycle. Except that he arrived in London on Christmas Eve, while it was still light, and his hand gets cut off the next day, also during daylight hours. Christmas is only a few days after the Winter Solstice, and the night lasts longer than fifteen hours in London at that time.** [[Recap/DoctorWhoS29E742 "42"]]: Averted in the "What's the next number in the sequence?" puzzle [[https://en.wikipedia.org/wiki/Happy_number#Happy_primes happy primes]] [[ShownTheirWork are a thing]]. However, it's also invoked: there are simpler solutions to this puzzle (421 if the differences between the numbers go up by 18 each time, 439 if the differences double each time), and with this kind of puzzle, the right answer should always be the simplest one or else the puzzle is no longer fair.** [[Recap/DoctorWho2007CSVoyageOfTheDamned "Voyage of the Damned"]]: It's stated that the conversion rate between British pounds and Sto credits is that 1 million pounds is roughly 50 million credits. Which means that the 5,000-credit phone bill that the Van Hoffs were so concerned they wouldn't be able to pay is roughly 100 pounds.** [[Recap/DoctorWhoS30E1PartnersInCrime "Partners in Crime"]]: There are 1 million people taking Adipose pills. Miss Foster claims that, when she activates the device to turn them all into Adipose, they'll be celebrating "one million birthdays". Except that one person can create multiple Adipose, so there'd be a ''lot'' more than one million. By the time the machine is shut off, there are only 10,000 Adipose, which means that somehow 99% of the people taking the pill didn't produce a single Adipose, and the rest only produced one each before the process was halted.** [[Recap/DoctorWhoS30E6TheDoctorsDaughter "The Doctor's Daughter"]]: The war between the humans and Hath has gone on for 700 generations, according to General Cobb. [[spoiler:It's later revealed that the entire war has supposedly only been going on for a ''week''. In the course of the roughly half a day of constant skirmishing the episode takes over, we only see one generation of clones being produced, which begs the question of how they could have burned through over 600 generations in less than a week.]]** [[Recap/DoctorWhoS37E7Kerblam "Kerblam!"]]: Kandoka requires 10% of the workforce to be human (the rest can be automated). The antagonist's stated justification for his act of terrorism is that it means only 10% of humans get to have a job (the rest are unemployed). Those are two completely unrelated quantities (10% of my doughnuts are chocolate: does this mean that 10% of all my chocolate goodies are doughnuts?); the fact that the hole remains wide open and unacknowledged even by the Doctor herself suggests the writers didn't notice.* ''Series/{{Elementary}}'': Not so a mathematic mistake so much as a slip in research:** The episode "Solve for X" is about the unsolved [[https://en.wikipedia.org/wiki/P_versus_NP_problem P versus NP problem]] and the real-life million-dollar prize for its solution. A mathematician character correctly exposits that (in a nutshell) P-versus-NP is about whether or not any problem whose solution can be quickly verified by a computer (NP-type problems) can also be quickly solved by one (P-type). A tech CEO correctly explains how it's relevant to cyber-security because encryption involves creating NP-type problems.** However, both characters imply that "solving" P-versus-NP would result in the ability to quickly solve NP-type problems (thus filling in large swaths of mathematics and ending cyber-security as we know it), which is far from correct. It's possible (in fact, likely) that P and NP are simply not the same set; any mathematician who proved this would still win the million (and some people's relieved thanks). Or maybe P and NP are the same, but proving it would only ''suggest the existence'' of a universal problem-solving algorithm, not necessary create it. Further, even if they found such an algorithm, it only need run in polynomial time. If the time it takes is proportional to the size of the problem raised to the millionth power, it's polynomial time, but no less computationally intractable.* Johnny Drama's age in ''Series/{{Entourage}}'' rises and falls between episodes. In some, he was in high school with Vincent, his younger brother, putting him at about three years older; in others he could drive and legally buy liquor while his brother was still in grade school.* ''Series/{{Eureka}}'' has time travel between 2010 and 1947. The time travel is explicitly said to be possible only when an eleven-year solar flare cycle is at its peak. 63 years are between the two points, too many for five cycles but not enough for six. Solar cycles average at around 11 years. Six cycles happening in 63 years is not out of the question. That being said, it was still wrong. There was a peak during 1947, but 2010 had low sunspot activity.* The creators of ''Series/TheFlash2014'' seem to be under the impression that 2024 is ''eight'' years after 2017 instead of seven.* It happens with the ages of the ''Series/{{Friends}}''. For example, Ross' birth date doesn't match with his purported age and his birth date changes throughout the series. The same problem appears when the matter of who is older ensues.** Rachel's LongestPregnancyEver also counts.** Possibly the funniest is that Monica and Rachel were stated to be twenty-six in the pilot, but they didn't turn thirty until season seven.* ''Series/GameOfThrones'': ** In the interest of epic battle scenes, the number of people killed on-screen may not match up with statistics about the battle:*** The Season 4 battle at Craster's Keep was against eleven mutineers. Jon Snow personally kills eight, Ghost another, and Locke another. Apparently the rest of the Watchmen only kill one mutineer between them?*** The episode "The Watchers on the Wall" features a battle between the Wildlings and the Night's Watch. The previous episode states that there are only 102 watchmen in Castle Black. There seem to be considerably more depicted in the episode. To wit, a conservative count shows 41 watchmen killed on-screen. This assumes that no watchmen died on the ground while the cameras were focused atop the wall, or while Slynt was running to the pantry, or during Alliser's duel with Tormund, etc. It also assumes Ygritte missed every shot that didn't cut to her target getting hit, which was most of them. It's ultimately subverted; a later episode establishes that they indeed lost fifty men, including most of their dedicated warriors, utterly devastating them as an organization.** Cersei and Jaime's age is inconsistent. Tywin Lannister was Hand to King Aerys II for 20 years before Robert's Rebellion, but Cersei, who became queen at 17 following the rebellion, remembers when he was appointed. In Season 4, Cersei says she has been queen for 19 years, which added to 17 would make her 36, but her twin Jaime was said to be 40 in the season premiere.* ''Series/{{Glee}}'' has an episode ("Acafellas") in the first season where Kurt drives himself, Mercedes, Tina, and Rachel to see Vocal Adrenaline perform. In Ohio, teenagers can get their permit at fifteen and their license at sixteen, and can't drive more than one other person until they're eighteen, which is pretty consistent with most states. Of course, it's possible that Kurt's breaking the law, but given [[SpringtimeForHitler his idea of chaos]]... ** Another episode ("Night of Neglect") has Will Schuester telling the kids they need to sell taffy to raise money. He reasons that, in order to raise $5,000, if each taffy is 25 cents, they need to sell 20,000. He writes it as "5000 x .25 = 20,000." However, one of the producers did later say that the math was intentionally terrible because they thought it would be funny.** Finn's father apparently died in Operation Desert Storm, when Finn was a baby. However Finn was a sophomore in the 2009-2010 school year meaning Finn was born at the earliest 1993, Desert Storm ended in 1991. It turns out she did lie, as she later reveals Finn's father came back from Desert Storm with PTSD, a drug problem, and an abusive personality. [[FridgeHorror This would be when Finn was conceived]].** Rachel says in the episode "Dreams" that she was born in December of 1994, meaning when she graduated in Spring of 2012 she would have been 17. Rachel also planned on getting married before graduated without her parents' permission, even though in the state of Ohio (and most others in the country) you need to be 18 to marry without parental consent.* ''Series/TheGoldenGirls'' was notoriously bad for this, especially regarding the women's ages. Fanon has tried to gloss over the worst of it by simply saying the women compulsively lied about their ages. ** The worst was regarding Dorothy and her first child. It was repeatedly mentioned that Dorothy had a shotgun wedding at 17, was married for 38 years, and divorced two years before the show began. While all this adds up to her age being fifty-seven with at least one child over 40. However, Dorothy was consistently "in her 50s" during the show's run (at least one time saying she was 55), and neither of her two children were ever shown at being anywhere over 30.** Rose held together pretty well. In an early episode Dorothy says Rose is 55 and Rose said she was married for 32 years. Since she married at 18, things worked well (born in 1930, married in 1948) until another episode said that her husband had been dead for 15 years, which would have made her 65 when the show began. They were only one digit off (had they said 5 years, it would have worked.) So close, yet so far.** Blanche was the most consistent, purely by accident. Blanche was obsessively protective of her actual age, so there were very few contradictory ages and birthdates given to the most concrete one. In a flashback, her mother mentioned that she ran off to marry an older man at 17 on Christmas Day 1949. This would mean she started the series at 53, lining up pretty well with an early episode where she begins to experience menopause.** Sophia says in an early episode that "I've lived 80, 81 years," suggesting she was born in 1906. However, in other episodes, she says she's been walking since 1904 and had romantic trysts between 1914 and 1920, when she would have only been between the ages of 8 and 14. This is usually chalked up to the fact that Sophia had memory problems from a stroke and was possibly senile.--->'''Sophia:''' I'm 80. I'm supposed to be colorful.* ''Series/{{Haven}}'' was always vague on how old exactly Nathan and Duke were when the Troubles last came in 1983, 27 years before the start of the series in 2010. Based on the stories they tell, they were somewhere around 9 or 10, as Duke has clear memories of his father, who died when the Troubles last came (putting their birthdates around 1973-74). However, the episode with their high school ClassReunion implies they graduated somewhere around 1995, meaning that unless they took the long route to graduation, something doesn't add up.* ''Series/{{Heroes}}'': Adam was around thirty when he was seen in 1671, which would make his birth year around 1640. But in a season 1 episode, "Takezo Kensei's" date of birth is given as 1584. Even accounting for the fact that Adam was a bald-faced liar, no one in their right mind would have mistaken him for an 87-year-old man. Especially since he didn't know yet that he didn't age. Of course, the season 1 thing could be hand-waved as an in-universe historical mistake, since Takezo Kensei is a legendary figure and since he was actually a cowardly English con-man (while everyone thinks he was a brave and magical Japanese warrior), the real details of his life were never known. There's also the point that it's implied that the majority of the Kensei stories never really happened, but were instead made up by Yaeko to create a StableTimeLoop. Within this context, it would probably make sense for her to backdate the events slightly to avoid awkward questioning of the legend. However, if this was true, Hiro would never have expected 1671 to be Kensei's time in the first place.* ''Series/HowIMetYourMother'' had a notable mistake in one episode, where Ted is haggling with a homeless man, trying to buy back some of Marshall's charts after the homeless man took them from the garbage. The homeless man won't accept any price other than a million dollars, so Ted promises him that he'll give him a dollar a day for a million days. The homeless man points out that that's twenty seven thousand years (and then accepts the deal). He added a zero- one million days is actually twenty-seven ''hundred'' years. (This has been corrected on subsequent airings.)* ''Series/{{Justified}}'': Protagonist Raylan's birthdate is given as 1970, yet he supposedly crippled high school baseball rival Dickie Bennett twenty years ago. Assuming that the show takes place during the same year it aired (2011) this would make Raylan twenty-one in high school, which given that he's been a Marshal for nineteen years (requiring him to have a college degree) seems unlikely. ''Justified'' is the name of the series. This is not a JustifiedTrope.* In ''Series/KathAndKim'' flashbacks show Kath being pregnant with Kim in the seventies, while Kim, Sharon, and Brett are teenagers in the eighties. Considering the show (aired from 2002) was set in the present day, Kim ought to have been born around 1978 and met Brett in the mid nineties. Rather than actually failing at math, the writers probably just thought the eighties were a better source of jokes (regarding fashion and whatnot) than the nineties.* ''Series/MacGyver1985'': "Ugly Duckling" shows a pretty accurate example of how [[http://en.wikipedia.org/wiki/Triangulation triangulation]] works, with one little problem: the two base points they were taking readings off of were so close together, and the two angles they found were so different, that the third point would have had to be ''so close they could already see it.'' To get useful triangulation readings, they would have had to be a significant distance further apart.* ''{{Series/Merlin|2008}}'' reveals two illegitimate children from Gorlois' wife Vivienne. The first of whom is Morgause, who was smuggled out of Camelot and declared stillborn to be kept secret. The second is [[spoiler:Morgana herself]] and Uther is the father, which poses problems since she and Arthur are roughly the same age -- and Uther either cheated on Igraine while she was pregnant with Arthur or else used magic to conceive Arthur almost immediately after his affair with Vivienne. Morgause was kept secret, which is considerably harder for the ''mother'' to do, and requires her husband to have been away from the kingdom for long enough for Vivienne to have her affair and carry the pregnancy to term. All the while Gorlois was away for long enough not to notice any of this -- and [[spoiler:Morgana's]] conception has to have happened recently enough before his return that the child could be passed off as his.* Certain aspects of ''Series/TheMiddleman'''s timing are... odd, though probably not outright contradictory. Consider the following:** The show seems to be set in 2009. Middleman '69 says he's been in cryo for forty years. Also, Wendy and Lacey have known each other for five years and met as freshman, and Wendy watched Voyager 2 pass Neptune (in 1989) when she was three, which would likely put her in the college class of 2008.** The Middleman was on his high-school football team in 1991. Presumably he was at least sixteen then, so he's at least 34 now.** Sensei Ping first defeated a hundred men when he was twice the Middleman's age. So he's at least 68 (and defeated those hundred men when he was at least 68; given how casual he is about the idea now, there's a decent chance he's a lot older). This is kind of weird on its own, especially since he doesn't look anywhere near that old, but maybe that's why he doesn't want people asking about his age. However, he's also been training in martial arts for "two of [Wendy's] lifetimes", and she's 23. He must therefore have been an adult ''before'' he started training.--->'''The Middleman''': Never ask Sensei Ping [[PlayingWithATrope about his age,]] the [[ChekhovsGun wrestler mask]]...\'''Wendy Watson''': Or the clan of the pointed stick, [[SchmuckBait I know.]]* ''Series/{{NCIS}}'' is pretty bad for this. Gibbs's backstory features a hilariously implausible timeline and Tony's age changes every other time it's mentioned. In ''Series/NCISLosAngeles'', G. Callen was in foster care from a very young age until, presumably, he was eighteen. During that time he was in 37 foster homes. All right. However, the longest he ever stayed in any home was three months. Even if he stayed in the other 36 homes for two months and 29 days each, that still doesn't come anywhere close to a minimum of thirteen years. And it's specifically mentioned that he usually only spent a few weeks to a matter of days in each place.* ''Series/NickyRickyDickyAndDawn'': In "The Quadfather" (eleventh episode), the four quads were stated to be having their tenth birthday. However, it had been previously stated that they were in fifth grade, meaning they should have been celebrating their eleventh birthday or they should have been in fourth grade. It would be highly doubtful that quadruplets would have all skipped a grade.* ''Series/TheOC'': In season one, Marissa's little sister Kaitlin is referred to by Seth as a fifth-grader, yet when [[PutOnABus the bus returns]] in season three, she's already in eighth grade, and looks even older, though strangely enough for a series heavy with DawsonCasting, ''she wasn't'' -- the actress turned fourteen shortly after her first episode aired.* ''Franchise/PowerRangers'' has screwed up a couple of times. Tommy was seen graduating high school as part of the Class of 1997 at the start of ''Series/PowerRangersTurbo''. By ''Series/PowerRangersDinoThunder'', he's got a [=PhD=], and is a teacher at another high school -- where his students have a prom at the end of the season -- for the Class of 2004. It's impossible to get that qualification, have time to do the research which [[NiceJobBreakingItHero led to the creation of the bad guys]], then become a teacher, in only seven years. Then in ''Series/PowerRangersSamurai'', [[ThoseTwoGuys Bulk]] is shown bringing up teenager Spike, the son of his best friend [[Series/MightyMorphinPowerRangers Skull]]. He's about 14 or 15, which would mean he was born during ''Series/PowerRangersZeo'' or ''Series/PowerRangersTurbo''. Wasn't mentioned at the time!* A case of Techs Cannot Do Math: A 1963 telecast of ''Series/ThePriceIsRight'' had a contestant, Richard Darling, returning as champ with $10,118 won the week before. At the end of his next show he has won an additional $6,670 in prizes, which would have brought his two-week total to $16,788. The tote screen showed it as $16,778.* ''Series/StargateSG1'':** Catherine Langford says she was twenty-one in 1945. This would make her four in 1928, yet ''Film/{{Stargate}}'' shows her to be much older (probably about twelve) in that year. Of course, this is hardly the only inconsistency [[AlternateContinuity between the film and the series]].** In "Between Two Fires", Carter (of all people) calculates that they'll need 38 Ion Cannons to defend the planet without any blind spots. While 38 would definitely get the job done, you can eliminate all the blind spots on a sphere with as few as 4 viewpoints.** In [[Recap/StargateSG1S4E6WindowOfOpportunity "Window of Opportunity"]], while hitting golf balls through the Stargate, Teal'c comments that Alaris, the planet they dialed, is several billion miles from Earth. That would put Alaris somewhere near Pluto. Heck, a light year is about 5.8 trillion miles and the closest star to our sun is Proxima Centauri, which is 4.2 light years away.* ''Franchise/StarTrek'':** There is an official mathematical formula for calculating how fast warp speeds actually are (different ones for TOS and TNG eras). However, if you look at the instances where distance, warp factor and time to arrival are all mentioned within the various series, it seems like [[TravelingAtTheSpeedOfPlot none of the writers bother with the formula]]. One of the more glaring examples is the ''Series/StarTrekEnterprise'' pilot "[[Recap/StarTrekEnterpriseS01E01E02BrokenBow Broken Bow]]", where the ship is said to be limited to warp 5 (on paper; in practice, they have yet to reach 4.5) but can reach the Klingon homeworld in four days, which ought to put Qo'noS somewhere in the Sol system's Oort Cloud by the TNG scale. (It's further but still way too close to make sense by the TOS scale.) This one's worse because of an offhand comment earlier in the episode that ''does'' sync up perfectly with the TNG scale. (At the stated speed, it would take 19 days to reach Alpha Centauri, our system's nearest neighbor.)** ''Series/StarTrekTheOriginalSeries'':*** In "[[Recap/StarTrekS1E20CourtMartial Court Martial]]", Kirk sets the computer to increase sound by a degree of "one to the fourth power." He, of course, presumably meant to say "one '''times ten''' to the fourth power", or possibly, "ten" ''instead of'' "one": "ten to the fourth power" (either of which is obviously better than simply saying "ten thousand"). ''One to the fourth power'' equals... one.*** In "[[Recap/StarTrekS1E23ATasteOfArmageddon A Taste of Armageddon]]", the power of a weapon is given as "Decibels - 18 to the 12th power". Setting aside the usual objections about sonic weapons in space (since Decibels can be used to measure any sort of power, and 'sonic' could just mean low frequency), we are left with the observation that not only has the writer bizarrely switched to base 18 (we'd usually say four times ten to power 22), but the writer is apparently unaware that decibels is a logarithmic scale. We have a power multiplier of 10 to power ((18 to power 12) / 10), which is a number far too big for the average scientific calculator, and vastly more power than the entire luminosity of our galaxy.** ''Series/StarTrekVoyager'':*** ''Voyager'' should have run out of torpedoes way before the end of the show based on the few times there was an inventory count mentioned in dialogue, but they somehow were able to keep firing them. They never seemed to run out of shuttles either: In one late season, Chakotay states that they have a full complement of shuttles despite at least three getting destroyed on-camera. Though it's implied by the construction of the Delta Flyer that the crew was rebuilding shuttles and likely torpedoes offscreen, and the ''Star Trek TNG Writer's Technical Guide'' states that ships have on-board industrial replicators to create standard parts of this nature.*** Even worse, and crossing into ArtisticLicenseBiology, is the Ocampan reproduction system. Each female can become pregnant and give birth once in her life, and every birth we know of was single, no twins triplets etc... Even if every single female successfully conceived and delivered a baby at that time, they'd still have a radically declining population. Which, coupled with an Ocampan generation being about 3-4 years, means that with those numbers the entire Ocampan race should become extinct in about the life span of an average 24th century human.*** WordOfGod does say that multiple births are relatively common in Ocampans, probably for exactly this reason (these exact factors would give an evolutionary advantage to the genetics that favor multiple births).** In one episode of Series/StarTrekDeepSpaceNine, O'Brien mentions that his wife is on Earth celebrating her mother's one hundredth birthday. As Keiko is roughly in her thirties, this means that her mother had her in her sixties. The original script called for her to be attending her mother's funeral.*** In "Rapture", Sisko says that a pillar is 11 meters tall, or about 36 feet tall. He then asks for a 75% scale reconstruction on the holodeck, which should be about 8 meters, or about 27 feet tall, but it's nowhere near that.** Hell, the very premise of Voyager is an exercise in this trope as well as ContinuitySnarl. Based on all pre-Voyager calculations of how fast warps are, their trip home should have taken a maximum of around 7 years, not 70, and maybe even around 4 weeks.** Regardless of the series, the usual warp calculations put the stars hours or even days apart - yet they stream by the main viewscreen as though you were driving through a snowstorm.* ''Series/Supergirl2015'': Kara's age when sent to Earth is given as thirteen. Twelve years later, she's twenty-four. A year after that, [[spoiler:her adoptive father, who disappeared sometime after Kara arrived on Earth, says that he's survived Cadmus for fifteen years.]]* ''Series/{{Supernatural}}'''s sixth and eighth season premieres both feature one year long {{Time Skip}}s that are frequently not accounted for whenever a date is mentioned on the show.* ''Series/{{Supertrain}}'' has a top speed of 250 mph and cruises at 190 mph, but takes 36 hours to cross the United States. That puts its speed at about 80 mph.* In ''Series/TorchwoodMiracleDay'', when the characters are calculating how fast Earth's population is increasing now that [[DeathTakesAHoliday no one can die]], they count the dead people twice.* In ''Series/VeronicaMars'', Logan Echolls finds out that his late mother's trust fund is running low unexpectedly. He's told that it's going to run out in fourteen months at this rate, but it turns out that it's only losing ten thousand dollars a month more than expected. The idea that his losing one-hundred and forty thousand dollars means he'll be broke in a little over a year doesn't mesh well with his continuing stereotypical rich-kid lifestyle nor the subtext suggesting that he noticed the missing money because he's actually being financially responsible.* ''Series/{{Warehouse 13}}'': Claudia is 19 in Season One. It's mentioned that she was 10 when her brother vanished, and that he was missing for twelve years. See the problem here?* In the first episode, of ''Series/YoungBlades'', [[HistoricalDomainCharacter Louis XIV]] is stated to be 15 years old. However, a later episode gives the date as 1652. Since Louis XIV was born on September 5, 1638, he would be either 13 or 14 in 1652.----

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