You start an 8 hr work shift at 6pm, if you have 25% more time to finish what time is it?

How to solve a basic math word problem using mental math calculation.
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[@silverhammer7779]

The wording should be, "you have 25% of your shift left until you can clock out." Then 12 AM is correct. As usual, your wording is confusing. If you're going to describe a problem in terms of English and then translate it into mathematics, the English must be at least as precise as the mathematics, or you will get multiple interpretations.

[@katecoe8322]

Thank you. I’ve been meaning to comment on that. The English language is not his strong point, but he does try hard to reach the math-resistant.

[@silverhammer7779]

@@katecoe8322Agreed. I can't fault his dedication to mathematics instruction, despite his overuse of PEMDAS (I mean, really...). But, as we were taught in engineering school, no calculation can be any more precise than its least precise term. This is also true when imprecise language is used to describe a problem that must be translated into a mathematical model.

[@miraheil5521]

Your English is just fine.

[@MFisher7346]

It was only the spelling I objected to, but there's no such time as 12 am. 12 is either midnight or noon. In this case it was midnight.

[@KemosabeTBC]

I think the wording was fine in this case because this is the only interpretation that allows an answer

[@lizardfirefighter110]

You start an 8 hour shift at 6pm. You would get of work at 2am, but you are working 25% MORE. 2 hours is 25% of 8 hours. So when you add 2 more hours you get off at 4am instead of 2am. Nothing was said about working 25% FASTER.

[@comicus6769]

Exactly, others are saying than he worded the problem badly but that isn't true. He just came up with the wrong answer to the way the problem is worded.

[@youxkio]

With that wording, we learned how engineers and businessmen present the projects' time and budgets. That's how they got so rich.

[@crowleythedemoncat]

Spelling is a problem as well, it's THEIR not thier.

[@PaulDurdin1]

Wow.. I thought I was being dumb. I read this several times and interpreted the challenge was that we had an 8 hour shift plus 25% extra to finish, the question was 'what time did we finish'. Clearly 4pm instead of 12am aka midday. Classic.

[@edwarddickson7731]

@@PaulDurdin112 am is not mid day.

[@regellery6695]

I added 25% on to 8hrs and got 10hrs taking me to 4am. It wasn't clear from the question that you meant that you have 25% of your time remaining. Poorly worded question.

[@robdjukic5996]

This word problem seems so ambiguously written, it has two possible answers... the one given in this video, and plus 2 hours equaling 4am.

[@rudymontana4515]

No, you're the problem.

[@m.h.6470]

My thoughts exactly. It should be "if you have 25% of the time left". This literally isn't a math question it is a grammar question.

[@robdjukic5996]

@@m.h.6470 I think this should be one of his problems where he says there can be two answers. 😀

[@Karanodom]

The word their is an exception to them rule i before e except after c. Weird is another. Love trying to do these problems. Thanks

[@m.h.6470]

The question is worded VERY badly. If you have MORE time, the 8 hours changes (to 10 hours). The question SHOULD be "if you have 25% of the time left, what time is it?"

[@Dwayne_Bearup]

He knows exactly what he's doing - getting more engagement with his content.

[@vss318]

I’m proud that I managed to do this in my head relatively quickly

[@suemoore1965]

I would say to use spell check but you simply wrote the word THEIR wrong. 😂😂😂

[@paulklee5790]

Your maths may be adequate but your command of precise English is pure pants…

[@katecoe8322]

??? Is that expression common in your country of origin, as ‘math’ in the plural is to some, or am I failing, as usual, to keep up with the times? ( In US usage just ‘math’ is inclusive of the various branches or can be used for a single one. I realize UK related countries use the plural, but. ‘pure pants’, uh, never mind, I just looked it up. Still need to learn its etiology, which I feel confident is a mind twister.)

[@carolleenkelmann3829]

@katecoe8322 I've never heard of Maths, the shortened form of the word mathematics, being referred to as "math" until KZbin. - such an ugly sounding word. It's missing something. But then, many Americans cannot speak English, refusing to use adverbs properly and constantly devoting attention to redundant usage of the preposition "of" with phrasal adverbs, producing "off-of" as a word. Or cutting out the "ly" on words such as "quick", mixing the adjective with the adverb. Basic English knowledge.

[@snotpu]

And "their" was mispelled as "thier"

[@EvgenyUskov]

a rather questionable wording... should not it have been something like "what if you do your job 25% faster"?

[@aebalc]

Agree very bad wording. I understood it to mean that you showed up for an 8 hour shift at 6pm and when you arrived they said "sorry boys you are working ten hours today" What time is it? Still 6pm. If you are expected to finish in 8 hours and you have 25% more time to finish that would mean you have 10 hours to finish.

[@robdjukic5996]

​@@aebalcI think "more time" should be edited out and "time left" inserted.

[@terry_willis]

I found the wording of the problem to be vague/confusing. When John verbally stated the problem, he added the word "remaining". That clarifies it much better. My suggestion would be "You start an 8 hr work shift at 6pm. If you have 25% of your shift remaining when you finish your project, what time is it?".

[@jimmcdonnell5325]

I would think that if i have 25% more time to finish, that would mean that i would have more than 8 hours. Hence 2 more hours since 25% of 8 is 2. Now if i worked 25% faster, the answer would be 12 am. What am i missing?

[@lindasapiecha2515]

👍

[@marknesselhaus4376]

Yeah, that's how I was see it.

[@rudymontana4515]

Common sense

[@hume6900]

All 3 of you are incorrect, although I agree with you that the better way of saying this problem would be that the worker has completed 75% of his 8 hour shift. If he started at 6:00 pm. what time is it now?

[@georgiapeach3556]

@@hume6900 12 AM start at 6 PM 8 hours is 2 AM 75% of 8 is 6 6 PM plus 6 hours is 12 AM However the way the question on the video is worded makes the equation of 4 AM

[@btk1243]

Conspiracy! -- Math Teacher once again tries to confuse students by manipulating the English language

[@xaxscratchxax926]

😆

[@martinfiedler4317]

Most "math" errors are rooted in ambiguous wording of math problems....

[@kevinreist7718]

Since you have 25% more time that's 1/4 of the 8 hours or 2 hours left. Therefore, you have only worked 6 hours thus far. Assuming you had no lunch break, the time would be midnight. Or, if you had a 1 hour lunch break, the time would be 1 a.m. Your communication skills are much better when you express it as a story problem, than when you write it out as a poorly expressed equation with more than 1 possible solution.. Now, I'll watch it and see if you've got some unexpected trickery you're planning to spring on us.

[@GeoffreyHellington]

I have never had issues with mental mathematics, in fact I used to get in trouble in school for not showing my workings out. I also have very little issue with the English language, being a bilingual British native I can almost always figure out any confusion after only a couple of re-reads and internal rephrasing. On this however, I have read the question several times and still have no idea what is being asked. I'm not going to bother watching a thirteen minute video that can't even present itself as legible

[@snotpu]

Strongly agree. I could not determine from the wording what exactly was being asked.

[@snotpu]

"If you have 25% more time left before your shift ends, what time is it?" is clearer to me.

[@jasonhorst9154]

Yes indeed. The way you worded the question makes one ask, am I working overtime? Hence completing my shift a 4am

[@rogermosberger6856]

I answered correctly, but he should stop saying "more" time! Unintentionally misleading.

[@martinfiedler4317]

Some use it that way. It's ambiguous, but a good reminder to think about what the question may actually be intended to ask.

[@renenadeau323]

Current time is midnight. Finishes at 2:am

[@markboyce1001]

4am

[@ChristopherLusher]

If you have 25% more to work before reaching 8 hours then 1.25x=8 thus 5x/4=8 thus x=32/5. 1/5 of an hour is 12 minutes, so x=6 hours and 24 minutes. Without taking a lunch break, the time would be 24 minutes past midnight. In other words, working an additional 25% over 6.4 hours will result in 8 hours worked. Working an additional 25% over 6 hours results in 7.5 hours worked.

[@chadarcher84]

Yeah, uhm, your math isn't mathing very well. He said 25% bud, not 20%. Lol. 25% of 8 is 2. Lol.

[@ChristopherLusher]

​@@chadarcher84 My interpretation wasn't that you have 25% of your shift left to work because the statement was that "you have 25% more time to finish." One could interpret the statement to mean 25% of the shift. I saw it as 25% of the time already worked. In other words, I've worked x number of hours and I've got another 0.25x left to go. Ambiguity in the question can result in multiple answers.

[@chadarcher84]

@ChristopherLusher I know, right? That's what upsets me is that this guy is a teacher and has been for a decade.

[@Bear-xp4wr]

I took 25% off 8 and added on to the 6pm

[@johngriffin3962]

Depends how you read it. If you have 25% more time before you finish, that could be read as if you have 25% more time left before you finish. If that's the case, then you have 2 hrs left before you finish, and since your 8 hr work shift ends at 2 am, then it is 12 midnight.

[@chanifarr8983]

Midnight. I've worked swing shift (6pm-2am) for over 15yrs.

[@carolleenkelmann3829]

"Many can't do it in ------- heads." Now here's a rule for you : it maybe that one rule for spelling is, "i" before "e" except after "c" but "their", is a possessive adjective and is only spelt ONE way. Not to be confused with they're, (the shortened form for they are.) or there, on the computer screen, all of which are pronounced the same, for all those struggling in English grammar. Obviously just a slip twixt....... here's to it, my friend.

[@keithschipiour4684]

Wow finally one I solved in my head

[@laurendoe168]

You should never use percent without following it with the word "of". Failure to do so is ambiguous at best.

[@tomtke7351]

confusing question

[@dlkline27]

Shift should have ended at midnight (got it in my head) but the boss said they had a rush job and authorized overtime at double pay. Worker went home at 5 AM.

[@hume6900]

I disagree with you. He is working an 8 hour shift, starting at 6:00 pm. If he starts at 6:00 pm. he would finish at 2:00 am. 25% of 8 equals 2 so take 2 hours off of 2:00 am. means it is 12:00 midnight. The other way to get to the same answer is, he has worked 75% of his shift or 6 hours. Add the 6 hours to his starting time of 6:00 pm. gives you midnight or 12:00 am.

[@richardgeordan7540]

I hope that one doesn’t end up in a math text book!!

[@nemelendez]

Depends, are you taking a 30 minute or 1 hour lunch break? Are the 8 hours consecutive or broken into 2 shifts or more? Just because you have 2 hours more to finish it does not mean you won't finish on time. It's like.....I was going to Nashville. On the way I met a family. The family were thdmom the dad 3 kids a dog a cat and a fish. How many were going to Nashville?

[@darkwitnesslxx]

I got this one right by making assumptions, but i agree with everyone else that you need to brush up on your English skills. Its a common problem on this channel, and with maths teachers in general.

[@ianhadfield65]

So happy I'm not the only one who said 4am ... It should say when you only have 25% of you shift remaining, what time is it

[@MrMousley]

If it's an 8 hour shift and it started at 6pm and you still have 25% of it to do that means that you have worked 75% of it which is 6 hours so it's midnight

[@Attayib]

My first impression when i read the thumbnail was, how much left from what he already worked in that shift. Then the solution would be 12:24 AM

[@sr2291]

8 hours is four 2s. 1/4 undone means you have completed three 2s or 6 hours. 6pm + 6 hours = 12 am.

[@lindasapiecha2515]

Thats a badly phrased question

[@AmillJaime-ub3lc]

The ? Is express wrong should ask if you finish 25% less in the swift.

[@SisterFromAnotherPlanet]

Super easy! (Do I get extra credit for catching you misspelling "their"??)

[@Harker777]

I said 4am but understood that it could have also meant to be 25% quicker therefore making it midnight. The question is very well phrased at all.

[@russelllomando8460]

got it, thanks.

[@joemeyer6876]

It’s time to stop working at Toyota Assembly. . . . That’s what time it is! Analycopulate a 2 am clock out!

[@-iceraptor-]

NO, it means that you have 25% left to finish of the 8 hour shift.. not 25% added on. The answer is 12am and you have 2 hours left to finish..you could also say the reverse and say that you've finished 75% of the 8 hour shift too..

[@Evertb1]

I came to the answer you wanted but the question was a bit ambiguous and could lead to different answers.

[@jackgilchrist6305]

I did my Maths GCSE through Manchester college when I had 50 questions I got it marked and the teacher said I got them all right but shed marked them as wrong because I did them all in my head got them all right but because I didn't show my working out she was convinced id cheated because she said she couldn't do them in her head so I must have used a calculator but I didn't I got all 50 right but all 50 she marked as wrong all because I could do them in my head and she couldn't .

[@laurendoe168]

8 = x + 0.25x. ; x = 6.4. If it is 12:24 AM, 6.4 hrs have gone by. I have 25% (of 6.4 hrs) more time to finish.

[@laurendoe168]

A better wording would have been, "if 25% of the shift remains, what time is it?"

[@bigblue4364]

Definitely more of a language trap than a math trap tbh, could just as easily be interpreted to be 12am or 2am, not so much 4am as some have said since the question is "what time is it" rather than "what time would you finish"

[@321Jarn]

Yeah definitely, multiple ways to interpret it I came up with: - 4 am because the shift takes 2 hours longer - 6 pm, you're starting the shift and the shift starts at 6 pm so it's 6pm - between 4 am and 6 am, you have more time doesn't mean you're actually using all the time - and of course the "correct" answer 12 am, you have 25% of your shift left

[@invictaone8514]

It’s 4 o’ clock ⏰ in the morning and it’s their not thier 🥰

[@spival88]

I figured out the 25% is 2hrs. If I started at 6am I'd be done at 2am. 2am-2hrs= current time

[@elijahyoungmantams3753]

If you have 25% more time to finish, you will finish at 4 am and if you have 25% less time to finish, you will finish at 12am. 8hrs = 480 minutes, 25% of 480 minutes = > 25x 480/100= 120 minutes (2hrs) 8hrs + 2hrs = 10 hrs which means if you start at 6pm you will finish at 4am

[@aryusure1943]

It is midnight of course. The hour of Cinderella. ;) I am getting better at translating your special wording.

[@elisabethwatkins7386]

Hi, I agree with the comments made. If you had simply said you " have 25%" to finish, then this is 2 hours, and the answer is 12am. However, 25%more is an additional 2 hours, or 2 hours more than 8. The jfi ishing time is therefore 4 am. However, I assume that as a good teacher, you were at pains to tell the students that they had only 25% left of the original 8 hours so as to clarify it for them. Additionally "Thier" , or the plural possessive is always spelt " their". The rhyme i" before e, except after c is not applicable here. Sorry about that. Otherwise, I felt your sum was a sensible example to use.

[@wallytorres2180]

Glad you teach math and not spelling

[@youxkio]

What do you mean by "you have 25% more time to finish." Who's perspective? Employee or boss? More time to finish means the boss gives you 25% of the working time of the day to finish your job or extra hours right? Or does it mean you finish your job and you still have 25% left of the shift without anything to do?

[@georgiapeach3556]

4 A.M.

[@aredhaired]

The question is "What time is it?". Look at the clock and you know !

[@magicone9327]

Should be rewritten, you finish 25% faster!

[@judithmaca1570]

I am very surprised that in concentrating on publishing this mathematical calculation, there has been no attention paid to spelling 'their' correctly!

[@kell_checks_in]

Wait a minute. Do we or do we not get a lunch break and is it paid?

[@johnmcmurray2110]

I solved "what time is it?" by looking at a clock. Absolutely horrible wording of the problem to get the answer you wanted.

[@mcp121]

So the question is "what time is it if you have 25% of your shift remaining?" 25% of 8 hrs is 2 hrs, so you have been at work 6 hrs. 6pm +6hrs is 12 midnight

[@BrianPinkerton1337]

It's six pm. Since the shift just started.

[@marthakratz7877]

How about saying that your boss is going to let you leave 25% earlier than normal?

[@sharonj3979]

This channel makes these math problems way to complicated and the wording is always ambiguous.

[@lpjcyngomiller5719]

If I get the question right it is 4am

[@slshusker]

You are correct, according to how I read it. Word problems must be carefully worded.

[@devonwilson5776]

Greetings. Based on my understanding of what is presented, the answer should be 4:00 AM. You are starting your 8 hour shift at 6:00PM. Working 8 hours, commencing at 6:00 PM should take you to 2:00 AM. Additionally, if it takes you 25% more time, that would give another 2 hours. Therefore, closing time for this individual is 4:00 AM.

[@carolleenkelmann3829]

It took me about 2 - 3 secs to do this. So I start at 6 pm and finish at 2 am. That's 8 hrs . A ¹/⁴ of 8 is 2. 2am minus 2 is 12 MN. - um Mitternacht. 😱. So, this was easy- peasy. No fluff like you, Mr maths teacher. But that's about the height of my mathmatical genius.

[@gh4121-b5n]

Consider your 8 hr shift as completing 100% of your shift. Every 2 hrs is 25%, so with 25% left it’s obviously 12am aka midnight where 2am is 100%

[@mikegiroux6530]

@carolleenkelmann3829 hey genius, he drags it out explaining everything for the people that don't know and understand how to solve such problems so they can learn the ins and outs to be able to figure out this type of problem on their own in the future. Should not have to explain that to a brainiac such as yourself. 🤦🏻‍♂️

[@carolleenkelmann3829]

@@gh4121-b5n Why complicate matters? Forget the %'age rows. I only need to know what 25 % is and subtract. Of course this example is very simple.

[@billthorburn7476]

12:00. 😊

[@brendaryan306]

Am I getting overtime pay and is it time and a half?

[@darrelpompilius8637]

This word problem is a crock of smoke. Did I start my shift or not? The way I see it is it takes 20 minutes to drive to the plant. Another five to walk to the extrusion line and punch in. So I have the time at 5:35 P.M. Man after all of this..... I think I will tie one one when I clock out!

[@evamarircasperite2058]

The problem with this problem was that you did not tell us if there was a 1 or 1/2 hour lunch break which would make it 8.5 or 9 hour work shift.😊

[@user-generated422]

Midnight

[@Adebolaemenlenjorhicksonne]

12 midnight 😊😊

[@lifewinsvlog]

Got it correctly

[@catomacro8325]

It is unclear what you mean . Do you mean what is 25%of 8 ( 2) In which case the extra 25% means you finish at 4.00am OR you complete the work with 25% of the shift left .in which case you complete the work by 12 midnight

[@davidmurphy563]

The question makes no sense to me. More time to finish, what does that mean? You spend longer getting ready to go homel? Maybe it's an expression I'm not familiar with.

[@OneKindWord]

And you can’t spell their.

[@ricardofigueroa6867]

I think the Department of Labor might want to have a word with you.

[@deonh8447]

Well is lunch 30 minutes or 1 hour?

[@jimfarrar4925]

Midnight...30 sec

[@ninaathome7804]

Misspelling: their

[@buster9271]

Thier? You mean Their?

[@SirPhilosopher]

MIDNIGHT

[@lorieprieto-wells9734]

You said “in thier heads”. Sheesh

[@gaia2uwilson]

12:00am

[@JaneSpencer-o7w]

Question is written wrong. The answer should be 4am not 12.

[@samero7318]

12:00am (midnight

[@bilum]

Forget teaching maths, start learning basic English because every time these videos appear on my feed the questions are always badly phrased.

[@danieldennis9831]

midnight but the wording could be better.

[@StephenRayWesley]

Yes

[@nickgilvey6763]

I slept in and got sacked!

[@seleenapearl8213]

4 pm

[@bamidurofelix6240]

The answer is 12am

[@williamkirkconnell7306]

8

[@tessamankay7258]

So we'll finish work at 12

[@geniferteal4178]

More time? Sounds like overtime to me. $$$

[@lillymarlane1796]

12

[@zolavib1187]

The math in this is not difficult. The most difficult aspect is the reading comprehension because the wording is unclear. These are those middle school math problems that ruined your math grades using English to create the difficulty. Reading comprehension is a needed skill in math but it should not be the main focus just as math is never the main focus in English class. I don't even know why you would go over the arithmetic aspect. Unless your target audience is young children there's no point. The math is so basic it's intuitive we're basically born being able to figure this out once our brains have developed to a certain point. Most people who answer incorrectly probably answer 4am thinking time is added to the shift when you say you have 25% more time to finish. And I would argue there's nothing wrong with that. The question in my opinion is not worded poorly it is flat out worded wrong. When you go to work you work and therefore any extra time to finish your work can only be time added to the shift. You could say there are lunch and bathroom breaks but who, who actually works as a dedicated employee uses up 25% of their time on the Jon or eating lunch. I would love to have two hours of my 8hr work shift slapping my dingdong. What job does this person have that they have to find a way to actually work. I need that job. It is probably the people who write these math problems because clearly they only get a few seconds of their day to get the job done and clearly they don't have a math education beyond first grade so they used writing to raise the difficulty level instead of actual math. But even so it's still wrong so maybe they didn't even go to school. In order to make this right you would have to assume that at jobs you can only manage to do your job 75% of the time at most. How the question is worded leave it open ended and you could only be working 1% of the time but some how mustered up the ability to work 25% more. There's a lot of assumptions behind actually "right". And you cannot expect anyone to assume in the way you expect. My English teacher taught me assumptions make an ASS out of U and ME, not percentages...

[@LJRIsaacs]

Why did I did it like this and got it right😂....6 to 8 = 13....25-13=12

[@jimduffy1967]

Yes ,the answer is 4 am ,6 pm 8 hrs is 2 am plus 25% is 2 hours so 4 am,.

[@bandini22221]

I don't understand the question.

[@paulwescott6412]

12 am

[@lpjcyngomiller5719]

Got the question wrong. 12am