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View Poll Results: 6÷2(1+2) equals what?
1 45 47.37%
7 1 1.05%
9 47 49.47%
No idea 2 2.11%
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  #161  
Old 03.06.2011, 15:27
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Re: 6÷2(1+2) equals what exactly

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Unfortunately you are wrong. The original of this equation should be like:
6÷2.(1+2). You can also put the "x" instead of "." When you have this it's clear: division is always done first. Now you can find the 9 result.

division is done first? who taught you math? (dont say my turkish math teacher because they dont teach no such nonsense)
  #162  
Old 03.06.2011, 15:43
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Re: 6÷2(1+2) equals what exactly

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The question was designed to confuse, having been written incorrectly.
It is not incorrectly written, unless you want the answer to be 1.

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A mathematician would not write it that way.
Nor would I, but AS IT IS WRITTEN, the answer is 9!

Tom
  #163  
Old 03.06.2011, 15:46
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Re: 6÷2(1+2) equals what exactly

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division is done first? who taught you math? (dont say my turkish math teacher because they dont teach no such nonsense)
Look, I was a member of Tubitak Mathematics Olympiad Team; and I'm far above you in maths, I already summed up inside the paranthesis, do I need to teach you how to sum 1+2? Are you first grade still?
  #164  
Old 03.06.2011, 15:47
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Re: 6÷2(1+2) equals what exactly

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The syntax is wrong. It would not be written like that by a Mathematician. See my previous post earlier on.
There is nothing wrong with the syntax. I accept that changing the syntax to (6÷2)(1+2) would make it clearer for people who do not understand the order of operations.
  #165  
Old 03.06.2011, 15:54
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Re: 6÷2(1+2) equals what exactly

QUESTION:
If 6÷2(1+2) is posted in a thread, HOW LONG WILL THIS THREAD LAST?

POLL:
a) 1 post with the obvious correct answer
b) < 200 posts arguing the obvious
c) Thread is eventually closed by a mod because the arguments get heated and personal

Last edited by TidakApa; 03.06.2011 at 15:55. Reason: ...... BODMAS people
  #166  
Old 03.06.2011, 16:03
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Re: 6÷2(1+2) equals what exactly

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I accept that changing the syntax to (6÷2)(1+2) would make it clearer for people who do not understand the order of operations.
I don't. If I saw such a redundancy I'd question whether the author understood the universally accepted operator sequence. The original formula is written correctly.
  #167  
Old 03.06.2011, 16:06
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Re: 6÷2(1+2) equals what exactly

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I don't. If I saw such a redundancy I'd question whether the author understood the universally accepted operator sequence. The original formula is written correctly.
That is what I said.
  #168  
Old 03.06.2011, 16:28
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Re: 6÷2(1+2) equals what exactly

I say 9, therefore it is wrong.
  #169  
Old 03.06.2011, 16:43
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Re: 6÷2(1+2) equals what exactly

First is solved what is in the parentheses and after the rest at least thats what I remember
  #170  
Old 03.06.2011, 17:12
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Re: 6÷2(1+2) equals what exactly

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You do multiplication first. Therefore, it's 1.
One always does the stuff in parenthesis first.
What most people forget is that multiplication and division are the same thing.

I.e.
6/2(1+2) is the same as saying...
6 * 1/2 * (1+2) so we do the stuff in parenthesis first
(1+2) = 3 therefore
6 * 1/2 * 3 now we can do all of the multiplication in any order we choose
6* 1/2 = 3 and
3 * 3 = 9

The only correct answer is 9 regardless of what order you choose to do the math.


Another way to so it...
6 * 1/2 * (1+2) is to expand the 1+2 portion as such
6 * 1/2* 1 + 6 * 1/2 * 2 after which we are required to do the multiplication first leaving
3 + 6 which equals 9.

Or
6 * 1/2 * (1+2) can be done other ways too.

The important thing to remember is that in order of precedence parenthetical operations are equal to multiplication. And both take precedence over addition.
This is not forgetting that multiplication is the same as division and addition is the same as subtraction.

Fun, no?
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Last edited by the_clangers; 04.06.2011 at 01:14. Reason: typo
  #171  
Old 03.06.2011, 17:19
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Re: 6÷2(1+2) equals what exactly

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One always does the stuff in parenthesis first.
What most people forget is that multiplication and division are the same thing.

I.e.
6/2(1+2) is the same as saying...
6 * 1/2 * (1+2) so we do the stuff in parenthesis first
(1+2) = 3 therefore
6 * 1/2 * 3 know we can do all of the multiplication in any order we choose
6* 1/2 = 3 and
3 * 3 = 9

The only correct answer is 9 regardless of what order you choose to do the math.


Another way to so it...
6 * 1/2 * (1+2) is to expand the 1+2 portion as such
6 * 1/2* 1 + 6 * 1/2 * 2 after which we are required to do the multiplication first leaving
3 + 6 which equals 9.

Or
6 * 1/2 * (1+2) can be done other ways too.

The important thing to remember is that in order of precedence parenthetical operations are equal to multiplication. And both take precedence over addition.
This is not forgetting that multiplication is the same as division and addition is the same as subtraction.

Fun, no?
quick-somebody solve it again! We need to make it to 10 pages before I'm convinced.

yeah, it's definitely niner.
  #172  
Old 03.06.2011, 17:22
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Re: 6÷2(1+2) equals what exactly

Oh, Slaphead....someone is having too much with the minds of the poor forum members here.
  #173  
Old 03.06.2011, 17:28
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Re: 6÷2(1+2) equals what exactly

I failed my Maths GCSE then only scored a C on the retake and the answer I got here was 9. (See post #2 a hundred years ago).

Will that sew enough seeds of doubt to make everyone go back over their calculations?
  #174  
Old 03.06.2011, 17:30
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Re: 6÷2(1+2) equals what exactly

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no. you are. I have to leave the PC now...before I snap it in half.

Most of the people on this thread work for banks or are responsible for key IT systems. Is this why we're in a economic slump? Did somebody divide then multiply by accident?
Bwhahahaha!!!
  #175  
Old 03.06.2011, 17:31
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Re: 6÷2(1+2) equals what exactly

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One always does the stuff in parenthesis first.
What most people forget is that multiplication and division are the same thing.

I.e.
6/2(1+2) is the same as saying...
6 * 1/2 * (1+2) so we do the stuff in parenthesis first
(1+2) = 3 therefore
6 * 1/2 * 3 know we can do all of the multiplication in any order we choose
6* 1/2 = 3 and
3 * 3 = 9

The only correct answer is 9 regardless of what order you choose to do the math.


Another way to so it...
6 * 1/2 * (1+2) is to expand the 1+2 portion as such
6 * 1/2* 1 + 6 * 1/2 * 2 after which we are required to do the multiplication first leaving
3 + 6 which equals 9.

Or
6 * 1/2 * (1+2) can be done other ways too.

The important thing to remember is that in order of precedence parenthetical operations are equal to multiplication. And both take precedence over addition.
This is not forgetting that multiplication is the same as division and addition is the same as subtraction.

Fun, no?
funny how many ways you can skin a cat. is somebody going to use a babylonian system to get us up to 200 posts?
  #176  
Old 03.06.2011, 18:02
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Re: 6÷2(1+2) equals what exactly

People who are positing that there are two valid answers to this maths problem remind me of this quote from Douglas Adams...

Quote:
The Babel fish is small yellow and leech-like, and probably the oddest thing in the Universe. It feeds on brainwave energy received not from its own carrier, but from those around it. It absorbs all unconscious mental frequencies from this brainwave energy to nourish itself with. It then excretes into the mind of its carrier a telepathic matrix formed by combining the unconscious thought frequencies with nerve signals picked up from the speech centres of the brain which has supplied them.

The practical upshot of this is that if you stick a Babel fish in your ear you can instantly understand anything said to you in any form of language. The speech patterns you actually hear decode the brainwave matrix which has been fed into your mind by your Babel fish.

Now it is such a bizarrely improbable coincidence that anything so mindbogglingly useful could have evolved purely by chance that some thinkers have chosen to see it as a final and clinching proof of the non-existence of God.

The argument goes something like this: "I refuse to prove that I exist," says God, "for proof denies faith, and without faith I am nothing."

"But," says Man, "the Babel fish is a dead giveaway isn't it? It could not have evolved by chance. It proves that you exist, and so therefore, by your own arguments, you don't. QED."

"Oh dear," says God, "I hadn't thought of that," and promptly disappears in a puff of logic.

"Oh, that was easy," says Man, and for an encore goes on to prove that black is whte and gets himself killed on the next zebra crossing.
  #177  
Old 03.06.2011, 18:31
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Re: 6÷2(1+2) equals what exactly

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OK, it's time to end this, with the open minded winning over the stubborn, in a debate and conclusion already drawn up by the mathematicians.

So, deal with it everyone.

The question was designed to confuse. It was a mathematical question written by a non mathematician, who got the syntax wrong. (I am not saying it was the Op, but the question has been around for a long time.)

This confusion forces ambiguity, which means 2 or more answers are correct.
No.
The question is designed to demonstrate whether or not the "device under test" understands how to correctly parse Algebraic Operands in Mathmatical Expressions.

The confusion is caused by people thinking there is ambiguity about whether or not there is a correct manner in which to do these things. math is nothing if not unambiguous.

The problem is that people don't understand that a/bc is the same as (a)(1/b)(c) but not the same as a/(bc).

It's ok to be wrong and doesn't make bad people but it still doesn't make a wrong answer right.

This is the great thing about math. It doesn't care how much money you have or your national origin. The correct answer is still the correct answer.
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  #178  
Old 04.06.2011, 00:06
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Re: 6÷2(1+2) equals what exactly

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Look, I was a member of Tubitak Mathematics Olympiad Team; and I'm far above you in maths, I already summed up inside the paranthesis, do I need to teach you how to sum 1+2? Are you first grade still?
"Are you first grade still?"

did you post this, really? REALLY?
  #179  
Old 04.06.2011, 00:27
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Re: 6÷2(1+2) equals what exactly

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The problem is that people don't understand that a/bc is the same as (a)(1/b)(c) but not the same as a/(bc).
Even I get it. It was primary school maths in my childhood. Age 10 I would say.
  #180  
Old 04.06.2011, 00:32
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Re: 6÷2(1+2) equals what exactly

In the same vein,

How much wood could a woodchuck chuck, if a woodchuck could chuck wood?

Tom
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