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Our latest update has been released! Please leave us a nice review in the App Store if you have the time, thank you!

This is probably my first giveaway, I did recently loot a Stuffed Android a few days ago. So, I'm gonna be nice for everyone for once and give it away. :)

The question is...

48÷2(9+3) = ?

**The contest is over.**

The question is...

48÷2(9+3) = ?

Post edited by Reiiich on

1

## Comments

2051,188Edit: didn't realise you wanted a debate, but the only answer is 2. For your other example, it would have to be written (48÷2)(9+3). As there are no brackets around the first part, the answer can only be 2.

5,0872055,08748÷2(9+3)

option 1:

48/2 * (9+3)

24*12 = 288

Option 2:

48/(2(9+3))

48/24 = 2

By convention, we work left to right, and therefore Option 1 is technically correct when the original notation is taken into account, as we execute the division before the multiplication of (9+3) by 2.

If you want to know more, check out this wolfram page, which compares how the annotation of the formula can change the result.

http://www.wolframalpha.com/input/?i={48/2(9+3), 48/2 (9+3), 48/(2(9+3))}&lk=2

3,6415,087It's whether you do

48/2(12)

as

(48/2) * 12

or

48/(2*12)

We do the first one, not because of order of operations, but because of the mathematical convention of working left to right.

6,328=48/2(9+3)

=48/18+6

=48/24

=2

That being said, I would do it like this

=48/2(9+3)

=48/2×12

=48/24

=2

5,087If you think about it like that, and do an expansion, you have to do it as

48

_______

2(9+3)

48

______

18 + 6

48

__

24 =2

The brackets are to intentionally mislead

It's better written as

48

__ * (9+3)

2

5,087What is wrong with this?

5,087@jellysnake @AMWhy @SP4RKS @PIPTR0

Go!

1185,0871,18848÷2(9+3) = ?

The answer is always 2. As there is no bracket around the first part, the multiplication would appear on the second line only.

If it was written as:

48

---- (9+3) = ?

2

Then the answer would be 288. However, it wasn't and so it isn't.

ETA:

the solution posted on the website you stated has an error. It says:

48 ÷ 2(9+3)=

48 ÷ 2(12)=

(48 ÷ 2)(12)=

24 * 12=

288

The third step here is introducing new brackets which are not part of the original equation. The line 48 ÷ 2(12)= is clearly 2 on its own. Adding a new bracket is poor mathematics, leading to the wrong answer.

79448÷24

=2

Edit: There seems to be different interpretations of this

Inputing 48÷2(9+3) into my scientific calculator gives 2

but by graphing calculator interprets it as (48/2)*(9+3) = 288 Dividing both sides by (a - b) is dividing by zero, which is the mistake.

5,087It's honestly a matter of intepretation.

I choose to go with the

mathematical conventionof evaluating left to right.However, if you chuck the equation into common calculators, they tend to lack the ability to make this judgement.

Check with wolfram, check with python, hell, check with matlab.

Wolfram (Online computation engine):

Python (Programming software):

Matlab (Professional Maths and Engineering Software):

Look I've given everyone a second crack at the prize, so just go with it, and try the problem I posted.

I've explained multiple times why the answer is 288, so if you're that desperate for the stuffed android, go try the second problem I posted.

I'm tired, and going to bed now.

Have fun with maths.

Goodnight.

5,087(Summons @Reiiich)

1181,188This is also evident in the fourth line as (a-b) = 0

6,453205Everywhen won the Stuffed Android, and then passed the prize on to Oxidis.

1,188Source: Maths degree

5,087Anyhow. I'm not going to argue about this anymore.

If you say its 2, then who are Python, Wolfram, Matlab and I to argue?

Ciao

1,188Python, Wolfram and matlab are all computer related and unable to compute this equation in the form it is written. Mainly because it is a badly worded equation. Try rewriting it as:

Let a=2. 48÷a(9+3) =

Are you really saying you would interpret that as anything other than 48÷12a?

ETA: You also didn't address the fact you are adding in new brackets that are not there. Do you not understand the implication of that major change to the equation? It is self evident from the different answers you obtain.

513Edit: done it easily I don't know how you could get it wrong you just need to know B.O.D.M.A.S and algebra

312791P- Parenthesis

E- Exponents

M- Multiplication

D- Division

A- Addition

S- Subtraction

Therefore, 2 is correct...

48/2x(9+3)

48/2x(12)

48/24

2 :) simple

513Brackets

Other

Division

Multiplication

Addition

Subtraction

1,188The order of multiplication and division doesn't matter (Imagine 15 cakes shared between 3 sisters, then sold for $2 each. How much money does each sister have? This is 15/3. Then x2. It equals 10. Alternatively, 15x2. Then/3. It also gives 10).

What is being misinterpreted in the question is what is being multiplied. As written, it is the denominator 2x12. If extra brackets were added, it would be (48/2)x12. The brackets are not there so that is incorrect.

513