48÷2(9+3) = ???

charles_92688

a) 2

b) 288

Hank Scorpio

bomdas would say it's 2, strange thread

charles_92688

nuxxx wrote: »

bomdas would say it's 2, strange thread

Who's Bomdas? Does he post?

Anyway, he would be wrong.

Madame K

nuxxx wrote: »

bomdas would say it's 2, strange thread

PEMDAS would agree.

*shrugs*

charles_92688

Madame K wrote: »

PEMDAS would agree.

*shrugs*

Sorry, wrong. PEMDAS would not say 2 unless he was smoking too much pot.

bytesize

yeah the answer is 2.

The rules states that you always do what's in the brackets first. then directly related to the brackets. Then based on signs outside you do those.

First: 9+3=12
Then: 2*12=24
Then: 48÷24=2

Simples

sponsoredwalk

Do you know what a binary operation is?

charles_92688

bytesize wrote: »

yeah the answer is 2.

The rules states that you always do what's in the brackets first. then directly related to the brackets. Then based on signs outside you do those.

First: 9+3=12 Yep
Then: 2*12=24 Nope
Then: 48÷24=2

Simples

Sorry, spin again.

charles_92688

sponsoredwalk wrote: »

Do you know what a binary operation is?

Who is "you"?

sponsoredwalk

charles_92688 wrote: »

Who is "you"?

Obviously you, though you raise an interesting psycho-philosophical point on the nature of identity...

I think I just noticed the irony in asking the question...

charles_92688

sponsoredwalk wrote: »

Obviously you, though you raise an interesting psycho-philosophical point on the nature of identity...

It wasn't obvious since your post A) didn't quote anyone and followed a post of someone other than me.

So, what do you think the answer is? Do you think it is 2?

sponsoredwalk

charles_92688 wrote: »

It wasn't obvious since your post A) didn't quote anyone and followed a post of someone other than me.

So, what do you think the answer is? Do you think it is 2?

Yes, I think it's 2, you got me. Do you know what a binary operation is?

cedan

Oh dear

bytesize

Charles I can see where you are coming from.

You are assuming that once we finish with the 9+3 inside the brackets, then we are finished with them and we should move on to working from the left to right.

But that is not the case. The brackets must first be removed completely before we can move to the next set of steps. Therefore we must multiply what is directly connected to the brackets and then we can work with the ÷.

charles_92688

sponsoredwalk wrote: »

Yes, I think it's 2, you got me. Do you know what a binary operation is?

It's 288. You'd be surprised how many engineers and mathematicians mistakenly would say it was 2. Makes me wonder how many designs have failed due to a careless math mistake. "Ya, it's 2. Now, let's go to production and build the plane...." Then they wonder why the plane crashed.

Go ahead, tell us what a binary operation is.

charles_92688

bytesize wrote: »

Charles I can see where you are coming from.

You are assuming that once we finish with the 9+3 inside the brackets, then we are finished with them and we should move on to working from the left to right.

But that is not the case. The brackets must first be removed completely before we can move to the next set of steps. Therefore we must multiply what is directly connected to the brackets and then we can work with the ÷.

Matlab, Google, and Excel all assume the same things I do. So do the rules of the order of operations.

im invisible

I dont know, but i do know there are 16 cups in a gallon, if thats any help

charles_92688

im invisible wrote: »

I dont know, but i do know there are 16 cups in a gallon, if thats any help

That wouldn't even help on this thread:

More A in B or more B in A?

sponsoredwalk

charles_92688 wrote: »

It's 288. You'd be surprised how many engineers and mathematicians mistakenly would say it was 2. Makes me wonder how many designs have failed due to a careless math mistake. "Ya, it's 2. Now, let's go to production and build the plane...." Then they wonder why the plane crashed.

Do you agree that I can write 2÷4 as 2·(4)⁻¹?
2/4 = 2÷4 = 2·(4)⁻¹
48÷2(9+3) = 48·[2(9+3)]⁻¹ = 48·[24]⁻¹ = 48÷24 = 2
What's wrong with this, what iron-clad rule of logic have I broken to cause a future challenger to crash?

sponsoredwalk

Did you know that particle physicists think the speed of light is 1? What fools - google says otherwise :rolleyes:

charles_92688

sponsoredwalk wrote: »

48÷2(9+3) = 48·[2(9+3)]⁻¹
What's wrong with this?

The problem as written is 288 doesn't equal 2.

These aren't equal to each other.

sponsoredwalk

charles_92688 wrote: »

these aren't equal to each other.

Why not?

charles_92688

sponsoredwalk wrote: »

Why not?

Because the left side of the equals sign is 288 and the right side is 2.

sponsoredwalk

charles_92688 wrote: »

Because the left side of the equals sign is 288 and the right side is 2.

So in other words you disagree that 2÷4 = 2·(4)⁻¹, which implies you're making no sense...

charles_92688

sponsoredwalk wrote: »

you're making no sense...

It is 288.

kenyard

why do they have to make things like this. if you type it into an excel sheet it will tell you you are missing brackets... and its right. there needs to be one more set orf brackets to specify exactly what to do and until such a time as they are added, the answer can be either or.
my 2c.
interesting to see the top post on this page though which actually lists the orders to do stuffs in when its "wrong"

sponsoredwalk

charles_92688 wrote: »

It is 288.

Why?

https://www.youtube.com/watch?v=O2WzWbQSPGw

One of Bertrand Russell’s lesser-known pro-secular works is a 1951 piece for New York Times Magazine called “The Best Answer to Fanaticism: Liberalism.” In this, he wrote a “Liberal Decalogue,” what might be better called today a “Secular 10 Commandments”:

...

4. When you meet with opposition, even if it should be from your husband or your children, endeavour to overcome it by argument and not by authority, for a victory dependent upon authority is unreal and illusory.
http://commonsenseatheism.com/?p=10937

charles_92688

kenyard wrote: »

if you type it into an excel sheet it will tell you you are missing brackets...

No it (Excel 2010) doesn't:

wonderfulname

I see your problem, google etc is seeing (48÷2)(9+3) as opposed to 48/2(9+3), multiplying unnecessarily, the answer is 2, 288 is an error I find it hard to believe you actually see as true given we're talking about a primary school level of maths, someone found a curio on the interwebs and decided to troll the mathematicians?

charles_92688

wonderfulname wrote: »

the answer is 2, 288 is an error

The answer is 288.

event

if ye knew the answer, why did you ask the question?