Jump to content

The Internet Is Completely Divided Over the Answer to This Simple Math Equation.


Bama

Recommended Posts

Davaoeno

If you told me there had been a poll and everyone on the internet had voted then I would say that  whatever the vote was the internet was completely divided.  If only one person on the internet did not vote then for me the internet was not completely divided - because after you counted the votes for both sides there was a remainder 

 

I believe the use of " completely divided" in the headline was just for dramatic effect . 

 

 

Edited by Davaoeno
Link to post
Share on other sites
  • Replies 35
  • Created
  • Last Reply

Top Posters In This Topic

  • SkyMan

    8

  • Salty Dog

    6

  • Davaoeno

    5

  • Headshot

    3

Top Posters In This Topic

Popular Posts

For me, the answer is 1. I've done reasonably high level maths and engineering calculations, and my instinct is that the 2 outside and immediately adjacent to the brackets belongs to and operates

actually " divided" could be 99% vs 1 %  

Ya think maybe we are just a tad bored today.

Posted Images

  • Administrator
Salty Dog
7 minutes ago, Davaoeno said:

 

I believe the use of " completely divided" in the headline was just for dramatic effect . 

Ya Think… 

  • Haha 1
Link to post
Share on other sites
to_dave007
3 minutes ago, Salty Dog said:

Ya Think… 

Ya think maybe we are just a tad bored today.

  • Like 1
  • Haha 2
Link to post
Share on other sites
Davaoeno
1 hour ago, to_dave007 said:

Ya think maybe we are just a tad bored today.

Not anymore! 😋

Link to post
Share on other sites
Soupeod
12 hours ago, trthebees said:

For me, the answer is 1.

I've done reasonably high level maths and engineering calculations, and my instinct is that the 2 outside and immediately adjacent to the brackets belongs to and operates on the brackets as a single expression to be calculated first.

If I wanted the answer 16 which the author prefers, I would write (8 ÷ 2) x (2 + 2) for absolute clarity.

Just my thoughts, I'd hate the next rocket to Mars to depend on it!

 

 

That is what I did a few days ago as well.  I got 1 then worked it as a 16 too. Then read up on this equation which one author said is written wrong in the first place. 

5 hours ago, Salty Dog said:

If you punch it into your computer you will get 16.

I bet that depends on how you punch it into your computer. :D

Edited by Soupeod
  • Like 2
Link to post
Share on other sites
Headshot

Try punching it in as (2+2)2/8... Then what do you get?

Link to post
Share on other sites
SkyMan
9 minutes ago, Headshot said:

Try punching it in as (2+2)2/8... Then what do you get?

A different answer because that's a different equation. 

  • Like 1
  • Haha 1
Link to post
Share on other sites
  • Administrator
Salty Dog
14 hours ago, Soupeod said:

I bet that depends on how you punch it into your computer. :D

I entered It exactly as it's written. 

 

10 hours ago, Headshot said:

Try punching it in as (2+2)2/8... Then what do you get?

But that's not what is written… 

Link to post
Share on other sites
Headshot
2 hours ago, Salty Dog said:

But that's not what is written… 

OK. And this?

    8

_____________

2(2+2)

Link to post
Share on other sites
SkyMan
14 minutes ago, Headshot said:

OK. And this?

    8

_____________

2(2+2)

Again, changing the equation will change the answer.  Try  8 / 2 X 4

Link to post
Share on other sites

The original expression 

8 / 2(2 + 2)

(sorry, my phone doesn’t have the proper “divide” symbol)

contains an assumption. It is assumed that 2(2 + 2) means that the content of the brackets is multiplied by 2. It should more correctly be written as 2 x (2 + 2) making the full expression

8 / 2 x (2 + 2)

If this is evaluated by the rules of BODMAS (which is what I learned back in the 50’s), division is performed BEFORE multiplication while the expression within the brackets is evaluated first. So...

8 / 2 x 4

4 x 4

16

Which, I might point out, is not what I got the first time. I read 2(2 + 2) as an expression to be evaluated in its entirety first. 

Which just goes to show why we need to see and recognize assumptions...

Edited by Paddy
Incorrect spelling
  • Like 1
Link to post
Share on other sites

Further...

The Original Post contains reference to a more recent rule - PEMDAS - and also refers to a similar rule BOMDAS - both of which reverse the order of Division and Multiplication (and I for sure don’t remember anything like BOMDAS!!)

The post includes reference to evaluating MD or AS in a left to right fashion (but suggests it is an ok shortcut).

If I take

8 / 2 x 4

And evaluate it strictly in accordance with PEMDAS I would get 1. Only if I use left to right evaluation would I get 16.

Are the various acronyms right or wrong and is left to right evaluation of MD or AS (considering those pairs to be equal in significance) a necessary part of the convention?

I have no idea!!

 

Link to post
Share on other sites
savarity

Does anyone have a problem with this:

8÷2×4

Which can be read as; eight divided by two times four. The answer being 16.

So then, what's the problem with the original:

8÷2(2+2)

After you do the addition in the parentheses you have the same thing.

To get 1 as the answer requires something like this:

8÷[2(2+2)]

or just do the first equation backwards:

8÷2×4
becomes
4×2÷8

However, you wouldn't read this sentence backwards, would you? So yes, left to right.

  • Like 1
Link to post
Share on other sites
RogerDuMond

The way I was taught to do algebraic equations, the answer is 16.

As a backup to my answer, I just asked my 9th grade niece to solve the problem and she said that the way they were taught PMEDAS, that the answer is 16.

  • Like 1
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use, Privacy Policy and Guidelines. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue..