99% of People Fail To Solve This | A Tricky Olympiad Problem

Hello, welcome to my KZbin channel.
Please make sure to leave a like and subscribe for more math content!
I upload daily, 3-5 videos per day.
#maths #algebra #mathematics #mathematician #mathematicians #algebra #algebratricks #algebraformulas #algebrahelp #olimpiadas #olimpiadmath #algebraquestion #algebraquestions #geometry #easymaths #easymathematics #easymathematicsforyou #multiplication #division #fraction #product #laws #lawsofexponent #howtolearnmathsfromthebeginning #howtolearnmathsfrombasics #howtolearnmaths #simplemathstricks #simplemathematics #simplemath #algebrahelp #simplealgebra#relaxingmath#howtosolvepotentialequations#potentialequations#solveforx#mathssolving#exponents #equations #exponentialequation #exponentialequations #algebrahelp #algebraformulas #algebratrick #highermathematics #highermaths #highermath#programming #programmer#sinus#sinx#cosx#findthevalueof
#powerdivision#olympiadalgebra#olympiadclass8

[@billharm6006]

Unusual problem in that If I use PEMDAS I get 14, but if I just go left to right, I also get 14. Thus, the problem does not really determine whether a person understands PEMDAS. OOPS.

[@Szejski]

IMHO the problem lies elsewhere: some people think that when operating according to PEMDAS, one first multiplies and only then divides.

[@billharm6006]

@@Szejski True. Some fail to consider (MD) as a type and (AS) as a type with occurrences of a type being resolved "left to right" when they appear. Some do M in preference to D and A in preference to S regardless of order appearing, apparently because that is their order in PEMDAS (just one of several problems with interpretation and application of PEMDAS). That said, The problem shown gets the same answer if I strictly apply PEMDAS or if I strictly go left to right. The strict left to right format is not PEMDAS as preached. Thus, a person can get the right answer for the wrong reason. The problem fails as a test of PEMDAS knowledge. It will, however, trip up an M before D believer, so the problem sort of half-way works. I would not use it on a test.

[@paulbrown8402]

Even more unusual, is that if you do the calculation backwards, you still get 14!!

[@xobeijo]

Not really. If you do multiplication first, you get: 7 + 7 ÷ 7 × 7 = 7 + 7 ÷ 49 = 7 + 1/7 = 1

[@TheOtherKine]

BODMAS

[@johnhamilton2213]

I've no idea where PEMDAS came from. I was taught BODMAS, and that's what I use.

[@camgere]

Bracket is pretty much the same as Parenthesis. Order is pretty much the same as Exponentials. You should come visit our universe on vacation.

[@castleanthrax1833]

They both mean exactly the same thing. Not "pretty much" the same thing. Exactly the same thing.

[@SuperSarah1954]

Answer is 14 - and I'm 71 years old and still remember how to do this. Miss Stennent, my maths teacher back in 1967, would be so proud, Now ask me what I had for breakfast this morning ha ha! - .....nah, I can remember that too.

[@Quakeboy02]

I can't even remember when I learned this, it's been so long. But, given your age, it must have been 1966. I can't believe they didn't teach this till 9th grade. But, maybe.

[@Kari-j1q]

@@Quakeboy02 I taught the order of operations in grade 5.

[@RodCalidge]

It's 14. The End.

[@MrPrestonmale68]

The end.....cause you're right. 😊

[@NenadGajić-s3t]

It is not 14...It is 7: 49 plus 7. The result is 7,143

[@ahsmeg4069]

#fail

[@jimcorboy4869]

Always amuses me to watch videos about math problems we did in like grade 2

[@nfpnone8248]

Why would anyone get this problem wrong, much less 99%, and you don’t need order of operations or PEMDAS! This problem can be rewritten immediately as 7 + 7^2/7 = 7 + 7 = 14. Sorry I didn’t use your left to right or PEMDAS, which have no place in mathematics!

[@joeisitt1904]

I thought that was called the PAWASE way, pissing about with a simple equation😂

[@petestransit]

100%

[@JohnLast-u8h]

Even by doing it the WRONG way, you always get 14.

[@xobeijo]

Not really. If you do multiplication first, you get: 7 + 7 ÷ 7 × 7 = 7 + 7 ÷ 49 = 7 + 1/7 = 1

[@xobeijo]

@@dimitrius-r5sgamingchannel388 No, because 7 1/7 implies a multiplication. 7 + 1/7 = 7/1 + 1/7 = 7/7 = 1

[@xobeijo]

@@dimitrius-r5sgamingchannel388 No, because 7 1/7 implies a multiplication. 7 + 1/7 = 7/1 + 1/7 = 7/7 = 1

[@thenuclearsandwich]

@@xobeijo 7 plus 1/7 is not 1

[@ronrice1931]

@@JohnLast-u8h No, you don't. A change to the order in which the operations are performed does NOT mean a change in the direction in which they are evaluated. That is always left to right. (7÷7)×7=7; 7÷(7×7)=7/49 When you perform the multiplication first here, you do NOT then say: 49÷7=7

[@smfvmd]

In my UK schooldays we knew it as BODMAS. Brackets, Of, Divide, Multiply, Add, Subtract.

[@ronrice1931]

Brits, man. Always with the conTROversy. :)

[@Quakeboy02]

Oh, this must have been that new math crap. We couldn't afford new anything when I was a kid.

[@castleanthrax1833]

O = Orders.

[@michaelannetts5714]

Use BODMAS it’s easier Brackets, Of or X, Division, Multiply, Addition, Subtract. Easy 🤔

[@stratovani]

Easy enough to solve. Just work it from left to right. Seven plus seven equals fourteen, fourteen divided by seven equals two, and two times seven equals fourteen, which is the answer.

[@Gk2003m]

If MD in that order, then you’d do the rightmost calculation first. 7x7=49. Then the division: 7/49 = 1/7. Then the addition, with a final answer of 7 1/7

[@critthought2866]

M and D are at the same level of operation, and therefore you use them in order left to right. The answer in the video is correct. You would get the same answer if you use the version in the UK: BODMAS (note that DM order here). Also, remember that division is just multiplying by the reciprocal, so division and multiplication are actually the same operation.

[@michi9816]

this is straight forward following the rules and for sure not a a task for the mathematical olympiad.

[@nittneylion84]

By the way, you can get 14 using different approaches: 1. + / x , 2. / x +…both get 14

[@Quakeboy02]

7+7/7x7 = 7+(7/7x7) = 7+((7/7)x7) = 7+(1x7) = 14. There may be other ways to arrive at 14, but those other ways are wrong, and will fail with a different set of numbers, such as 1+2/3x4. OTOH, where the numbers are the same, i.e. N+N/NxN you will always get 2N as the answer.

[@charlesmrader]

There is a lesson here, but it is not a lesson for people who don't know the rule for order of operations. It is a lesson for people who write down these expressions. If 99% of people will fail to understand the expression you write, you should try another way. If you write 7+(7/7)/7, almost nobody will get it wrong.

[@jaydee2072]

Pretty much spot on. Math has symbols for a reason, leaving them out and expecting someone to just insert them is the real joke here

[@clarencegreen3071]

My thoughts exactly. People like engineers, physicists, etc. would never write an expression like this. If proper notation were taught from the beginning, all this confusion would be avoided.

[@angelagregory1042]

I got the answer 14 even before I started the video rolling

[@DemocratsUnite]

Ever since high school, I’ve been waiting for an opportunity in life to use this. So far, no luck.

[@Bigfoot-px9gj]

I learned PEMDAS 50 plus years ago, and I agree... Except for silly math puzzles, I have never used it either.

[@kellyandrews8161]

middle school

[@susangratwick5327]

14. BODMAS. Brackets, division, multiplication, subtraction. That magic order of operations remembered from 4th year of secondary school in England, but I do not know the logic behind or the reason for this order of operations. Does anybody here know?

[@colinl9018]

It's 14. PEMDAS is BS. I'm 66 years old and when I went to school this was called simple maths. It's still simple. I do not believe that 99% of people fail this test, it's just your way to get clicks. I won't come on to this site again.

[@mv69969]

You would be surprised how many people are not able to solve it ! I asked some !

[@jayvaccaro140]

It's an exercise in "order of operation".

[@richardcosta3504]

I’m glad this guy wasn’t my math teacher. There are two components to good teaching. Knowing the subject, which most math teachers possess. He has that. The ability to explain a problem’s solution clearly and without confusion. He doesn’t have that.

[@bigdog3628]

I partially agree. Yes for the two you mentioned in general teaching, but when it comes to mathematics there are an additional 4 requirements: 1:) Absolutely NO Multiple Choice Unless you are requiring full work to be shown 2:) All Unknown Variables that are being solved for MUST be verified with substitution. 3:) No partial credit whatsoever the answer is either 100% correct or 100% wrong. The first 2 might as well be written in stone, but the third one is a bit flexible I guess.

[@johntorres4573]

I didn’t follow the order,but still got 14

[@mimon4884]

The right answer is 7 1/7. Thank me later 😉. Greetings from The Netherlands.

[@petestransit]

I looked, solved the equasion in seconds! and did not use your method!

[@colinmccarthy7921]

You apply BODMAS.I learnt this at school in England.

[@garyfestarini9608]

My 7 year old grandson explained this perfectly.. Not sure what kind on Olympiad this is presented in.

[@russellesimonetta9071]

I just did it step by step in my head and got 14.

[@tonyorwin-nt6um]

What!! I'm a thicko,but old school got 14 in about 10 seconds 😮 Hang on I've suddenly become a Mathsology Genius😂 No more labouring for me.👍🌟

[@randyhanula1265]

Talk about taking the long way around to get to the end

[@AmyraCarter]

If one does multiply first, the result will be (8.14).round. Basically, it's what happens when one divides 7 by 49. 😆

[@ronrice1931]

In this particular case, the order doesn't matter. In most cases, it does.

[@Quakeboy02]

@@ronrice1931 Say what? 7+7/(7x7) is not 14. Order always matters, and it's always left to right.

[@ronrice1931]

@@Quakeboy02 You're right. I think several people here are thinking that 7÷(7×7) is equivalent to 49÷7, when in fact it equivalent to 7÷49. They switched not just the order of the operations but the order of the values as well.

[@Quakeboy02]

@@ronrice1931 Anyone who still can't figure this out needs to turn all the divides into multiplications. By this, I mean convert 7/7 to 7*(1/7). It's usually the divides that cause people to screw it up, when it's not, it's because they don't understand precedence and just march from left to right calculating an intermediate result without regard to the operator. To those people, 7+7/7 would equal 2, i.e. (7+7)/7, instead of the actual value of 8, i.e. 7+(7/7).

[@andrewellis1934]

These rules just over complicate a simple problem and make mistakes more likely.

[@ahsmeg4069]

Which olympiad would this be from? The Tiddlywinks Olympiad? Because this is not a Math OIympiad question.

[@massacmongo995]

The person who struggles with math sees this and just says screw it

[@manuelquitevis6794]

7 + 7 :7 x 7 .= 7 + 1 x 7 =7 + 7 = 14

[@thomasharding1838]

The problem should NOT have been presented in a manner that could be performed in an incorrect manne but still obtain the correct answer. Maybe throw an 8 in there somewhere.

[@Quakeboy02]

Presenting it this way made it clear that the answer was going to be wrong if you used the wrong precedence regardless of the numbers.

[@ArtinYeghyaian]

Primero, se separan términos. El signo de +, muestra que hay dos términos ( los signos de + (y) - separan términos, los de x (y) : , unen términos. a) Primer término es 7. b) El segundo es : 7 : 7 x 7 ...... (7:7 = 1......1 x 7 = 7 c) 7 + 7 = 14 No es ni necesaria dar esta explicación.

[@iceman9678]

I guess factoring out the 7 was not necessary.

[@KW-gb9cd]

7 + 7 × 1/7 × 7 = 7 + 7 = 14.

[@johnshaw6702]

Bad example. But I find it sad that so many channels have to explain basic math to people.

[@SebastianSkowronek-rp8zv]

Is this a joke? 2nd grade math is an olympic question?

[@umamaheswari4625]

14

[@davidwebster9788]

Is PEMDAS always used on test (SAT, GRE, etc).

[@Quakeboy02]

It's always used by your calculator and your computer, so what do you think? There is only one way to do math and get the right answer.

[@davidwebster9788]

@@Quakeboy02 Yes, I know that. But if one test uses PEMDAS and another PEJMDAS, then you need know as they can give results.

[@Quakeboy02]

@@davidwebster9788 I don't know PEMDAS from PEJMDAS. What I know is the calculator and the computer. Additions and subtractions are not in the same grouping as multiplications and divisions. So you have to group the mul/div together which turns them into single entities which can be added or subtracted. Can I assume that PEJMDAS is the HP version (RPN) of PEMDAS for their calculators?

[@davidwebster9788]

@@Quakeboy02 PEJMDAS give implicit multiplication a higher order of precedence. My point, though, was that people who create standardized exams should state which convention they are using.

[@Quakeboy02]

@@davidwebster9788 Once again, what does your calculator say?

[@RobertCanova-sn4sh]

It's not a "tricky " problem. It is poorly written. Of no use to snyone.

[@TKM1951]

14 - no kidding

[@hangthuy458]

7+1×7=7+7=14

[@michaellong-i9r]

off the top of mead 36 . 1

[@megconnell823]

So what about BODMAS.

[@freedomjunkie7843]

Yup. Grew up on BODMAS, never did me any harm :)

[@Jmax-v3k]

6 to 1, half a dozen plus 1 to most

[@Smf7161]

14 is the answer!

[@michaelcoulter3696]

Why is it hard to work out 14 as answer?

[@edwardenglish6919]

2 seconds

[@arthurmabeejr8752]

The "pemdas" works well and I see some commenting by saying by doing the problem incorrectly they still come up with 14??? I say bologna and hogwash, I think the author of the video will agree with me? When I was in high school in my junior year my math teacher had me teaching her class but, by then I already had and passed with flying colors algebra, trigonometry ect., She said my shortcuts were not taught to her when she majored in Mathematics in college. There are shortcut formulas that will still give you 14 but, never heard of someone doing the problem incorrectly come up with 14???? The "pemdas" as I said works well but, how can someone insult my intelligence? This is what's wrong with the world today........You can help a lot of things but, you can't fix stupid!

[@VincentQuinn-ru9jf]

14 IAM 85year

[@dougmorris5625]

I get 14

[@lifblackberry]

Why 2 minuttes. 5 seconds

[@RonJones-k7r]

49

[@DennisHughes-h8b]

49.

[@ronaldmcdonald8303]

14, easy

[@tellecegraham3207]

My answer is 14

[@DennisHughes-h8b]

56

[@michaelmelton7295]

Acromem?

[@manuelquitevis6794]

7 + 7 = 14

[@richb1576]

2 X 7 = 14

[@Stevespecs]

2 seconds, 14

[@nicatare2257]

7+7=14 14

[@tapejara1507]

7+1/7

[@Quakeboy02]

Try it on your calculator and see what that says.

[@phatmanc7078]

Can you Americans not do maths in your head that's shocking

[@michaelmelton7295]

Could you enunciat your words better?

[@cryptocoinkiwi8272]

Facepalm...

[@valuemastery]

99% fail is nothig more than clickbait. This calculation is laughably easy, it's for absolute beginners in math that have just learned the order of operation. BTW, the result is 14. Where is the statistics that shows the 99%, so that it can be verified? It's just a dumb claim.

[@Quakeboy02]

And yet, I've been chastised by no less than engineers who say they don't use this rubbish. How they can remain gainfully employed if they can't do basic math is a real mystery to me.

[@clarencegreen3071]

@@Quakeboy02 Engineers, physicists, etc. would use proper notation that is not ambiguous. I'm an old, has-been physicist and had never heard of PEMDAS or whatever until I found it on the interweb a year or so ago.

[@hc3657]

Solve 7 + 7 divided by 7 x 7 Note there are no brackets to separate the numbers only the division sign which signifies this equation is an algebraic equation for a fraction. 7 +7 = 14 which is the numerator in this fraction divide by 7 x 7 = 49 which is the denominator in this fraction Answer is 14 / 49 = 2/7. or where A = 7 7 + 7 = A +A = 2A and 7 x 7 = A x A = 2A divided by A x A = 2/A = 2/7 Algebra is fun when you know what it is. OR if you have used brackets in your equation which this equation does NOT have. 7 + (7/7) x 7 = 7 + 1 x 7 = 7 + 7 = 14 🤪🤪🤪🤪🤪🤪💪💪💪💪💪💪

[@dimitrius-r5sgamingchannel388]

Even without brackets, the answer is fourteen, because addition is done last. In this sum, division is done first, then multiplication, then addition.

[@hc3657]

@@dimitrius-r5sgamingchannel388 No because the division sign makes it a fraction where the 7+7 is the numerator is separated from the rest of the equation the denominator being 7 x 7. which equals 1. Without the brackets everything to the left of a division sign is a numerator and everything to the right is the denominator. Always solve the denominator first. It is basic algebra. You are doing a linear process as used in basic calculators which can not do Algebraic equations. Brackets were created for a reason. How about this ? Wrong of course. 7 + 7/7x7 = 7 + 7/49 = 7 + 1/7 ? I was an engineer experienced in high order mathematics writing computer programs. Suggest you do some revision in fractions and Algebra. Quadratic equations and such. 💪💪

[@dimitrius-r5sgamingchannel388]

@@hc3657 The division doesn't make it a fraction. If you were to use Bodmas (or Pedmas or whichever you use), you would know division comes first in this sum comes first, then multiplication, then addition. Either you didn't know this, didn't understand it or have forgotten it, so I'd say you're the one who needs to do some revision, especially if you have experience in high order mathematics as you claim. Who said anything about basic calculators? Ones programmed to use Bodmas are better, and these ones give 14 as the answer. Where you get fractions from, I don't know, as there are no fractions in this sum.

[@sibermansgames2110]

Answer is 14. Brackets aren't needed, you simply use BODMAS, which states that division and multiplication are done before addition. So 7÷7=1. 1×7=7. 7+7=14.

[@SamTether]

Definitely 14. Don't know why you're bringing fractions into this when there aren't any to begin with.

[@iwillsaythisonlyonce]

56

[@ainthshifana8296]

14

[@michaelcarroll172]

14

[@mikemassey7403]

14

[@michaelpfister1283]

14

[@marktahriri6581]

14

[@DavidChadderton-g7d]

14

[@Kyrelel]

14

[@thomfisher1100]

14

[@michaelvessels9668]

14

[@ljupkaivanovska1275]

14

[@billhawkesworth990]

14

[@396Cap]

14

[@heritageofhastur]

14

[@kathleeno1441]

14

[@dipankardasgupta5125]

14

[@kellyandrews8161]

14

[@Nance54]

14

[@JoycieMbaya]

14

[@Arden-o1i]

14

[@billhawkesworth990]

14

[@PryceMortensen]

14