6÷2(1+2)=? (1 Viewer)

CovKingChris · Apr 29, 2011

Is the answer 1, or is it 9?

IMO it's 1.

Marty · Apr 29, 2011

The answer is 9

CovKingChris · Apr 29, 2011

Depends on which was you look at it. At first I thought the answer was 9, but today I realised it's 1.

Marty · Apr 29, 2011

Enlighten me......

SkyBlueMania · Apr 29, 2011

It's 1 people, don't you remember BODMAS from school!

(always perform in the order Brackets, Orders, Division and Multiplication, Add and Subtract)

Disorganised1 · Apr 29, 2011

It's 1 ~ and there's no point of view - it's 1

im-confused · Apr 29, 2011

It is 9 isn't it?

CovKingChris · Apr 29, 2011

2+1 = 3

2*3 = 6

6/6 = 1

CovLis86 · Apr 29, 2011

The answer is 9.

Brackets, over division, multiplication, addition and then subtraction.

So the brackets is 1+2 = 3.
Then next is division, so 6/2 = 3.
Then its multiplication, so thats 3 x 3 ( outside brackets multiplying what is within the brackets) . So the answer is 9. Thats just fact.

Jimthor · Apr 29, 2011

The answer is 9. At first i couldn't make my mind up, but i typed it into Excel which said 9, so i've had a think and i've found the logic behind it now.
The way i see it, the ordering of multiplication isn't actually of importance, it's nothing to do with BODMAS. It's just to do with how it's written. Lots of people think it's 1, but they're looking at the sum the wrong way, and multiplying the denominator by the (1+2). To solve it this way you'd have the sum written 6/(2(1+2)).

I think it's easier to understand if you write it on paper. I've tried to explain it as fully as possible here, showing that it's 9 whether you divide or multiply first. The first step i've shown is the key bit really, just writing it out 'correctly':

rob9872 · Apr 29, 2011

It's 9

If you wanted it to be 1 then you need more brackets:

6/(2(1+2))

rob9872 · Apr 29, 2011

Ah as above just beat me to it

A few days away on holiday and the forum has sunk to this

Good news on Thorn though

Richard Smith · Apr 29, 2011

i have just got in from the pub after a bit of a seasson and it all looks a complicated blurr to me

CovKingChris · Apr 29, 2011

I'm not really sure.

Jimthor · Apr 29, 2011

CovKingChris said:
You don't do the 6/2 first though as it has no brackets. The overall question makes 6 / 2 * 3 = ?

I have done the brackets before any other mathematical operations. The first thing i've done is written it out in a different format.

Remember that 3 is the same as writing 3/1. So we're multiplying two fractions: 6/2 and 3/1. When you multiply fractions, you multiply numerators by numerators, and denominators by denominators.

Covstu · Apr 29, 2011

defo 9 but i cannot belive how much effort people went to prove this!!!

Houchens Head · Apr 29, 2011

9 It's obvious. You do the first part: 6÷2 which = 3, then multipy that by what is in the brackets (1+2) which = 3. Therefore 3 x 3 = 9 Simples!
Any more? These are easy!

Sky Blue Sheepy · Apr 30, 2011

It's 6 divided by 2(1+2) which means 6 divided by 2 lots of 1+2 which is 6. 6/6 = 1

im-confused · Apr 30, 2011

Is this all because of that stupid poll on facebook? Because if so, that is very very sad.

BackRoomRummermill · Apr 30, 2011

BODMAS it is definately 9 Guys

BackRoomRummermill · Apr 30, 2011

Here is one for you

(24-4) + 6(3 x7) = ?

MatthewWallis · Apr 30, 2011

Sky Blue Sheepy said:
It's 6 divided by 2(1+2) which means 6 divided by 2 lots of 1+2 which is 6. 6/6 = 1

You are wrong, it's everything out the brackets multiplied by everything inside them. Therefore it's 6/2 which Is 3 multiplied by 1+2 which is 3, so simplified it becomes 3(3) which becomes 9.

MatthewWallis · Apr 30, 2011

BlackRoom - 146?

CovKingChris · Apr 30, 2011

BackRoomRummermill said:
Here is one for you

(24-4) + 6(3 x7) = ?

The answer is 146

BackRoomRummermill · Apr 30, 2011

146 is correct :claping hands:

21 x 6 + 20

Houchens Head · Apr 30, 2011

Sky Blue Sheepy said:
It's 6 divided by 2(1+2) which means 6 divided by 2 lots of 1+2 which is 6. 6/6 = 1

WTF are you bangin' on about? What school were you at? Three Spires?

Sky Blue Sheepy · Apr 30, 2011

Houchens Head said:
WTF are you bangin' on about? What school were you at? Three Spires?

Well I got an A in my GCSE you cheeky fucker, but it was a few years ago so I might well be wrong...

SkyBlueMania · Apr 30, 2011

The answer is 100% absolutely totally and utterly 1, guaranteed.

It is exactly as Sheepy said, the 2(1+2) means two lots of what is within the brackets, the two before the brackets cannot be used elsewhere in the calculation.

I'mARealWizard · May 1, 2011

As a maths teacher, I can tell you that the answer is most definitely 1.

And this goes to show why you are taught BODMAS in schools.

Because we read (in western society) from left to right, and other cultures read from right to left, AND because people have their own ideas about which operations are the most important, BODMAS is a standardised way of dealing with calculations.

The first operation to complete is the brackets (1+2) = 3

You then need to multiply the brackets by 2 BEFORE doing the division. This is because 2(1+2) actually means two lots of the brackets. And it still falls under the 'Brackets' part of BODMAS.
If it had read 6÷2x(1+2) then you would do (6÷2)x(1+2) which is, clearly 9.

I hope that helps and puts an end to this confusion :wave:

I'mARealWizard · May 1, 2011

Not that this has been playing on my mind at all...

But if you multiplied out the brackets first so that the equation

6÷2(1+2)=

became

6÷(2+4)=

you can now see what the real answer is...

:laugh:

skyblueprincess · May 1, 2011

I think its 1 ... Or could be 9 .. no its 1 .... !!! erm

egastap · May 4, 2011

The answer is 9....and it is to do with BODMAS.
I quote

B
Brackets first
O
Orders (ie Powers and Square Roots, etc.)
DM
Division and Multiplication (left-to-right)
AS
Addition and Subtraction (left-to-right)

Divide and Multiply rank equally (and go left to right).
Add and Subtract rank equally (and go left to right)

So, when you apply the "Divide and Multiply" rule, which is carried out in the order of left-to-right, the answer is 9.

Phew.....finally!

rob9872 · May 4, 2011

I posted 9 earlier in the thread, but it is definite;y 1 and I'm happy to say I was wrong. You should too egs, read it again and you will see that it can't be anything else

rob9872 · May 4, 2011

Actually scrap that. Hard to believe but my maths is normally excellent and I really can't decide

We'll_live_and_die · May 4, 2011

CovKingChris said:
2+1 = 3

2*3 = 6

6/6 = 1

In BODMAS division comes before muliplication, so you have done it wrong by doing the multiplication first.

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