Poll: 6÷2(1+2)

snowdog · 29 Apr 2011 at 00:34

The answer is 9, 1 is definitely wrong:

6/2(1+2)=6/2*3 = 9

If it was one:
6/2(1+2) would have to equal 6/(2*3), but it doesn't !

Google clearly says it's 9 too:
http://www.google.nl/search?hl=nl&q=6/2(1+2)+=&meta=&rlz=
So does my texas instruments graphical calc.

6/2(1+2) means
6/2*(1+2) means
6
___ * (1+2)

2

However, op says 6÷2(1+2) which is 0*3 so
6÷2(1+2)=0
but
6/2(1+2)= 9

The ''one'' people are confused with 6/(2(1+2))...

fornowagain · 29 Apr 2011 at 00:35

This one or very similar is all over the place causing some quite funny rows. It's ambiguous, it's designed to be ambiguous. However as an Engineer I simply cannot persuade myself to disassociate the bracketed term and because I can legitimately expand the equation 6÷2(2+1) > 6÷(2x2+1x2) then I'd have to say 1.

guyfawkes5 · 29 Apr 2011 at 00:36

Eric's collar said:
When you do trig equations you go from right to left. Does that apply to all equations?

If you think about it, it's irrelevant to the equation.

It depends on how you interpret the 'blocks', if any at all, in the proceedings of numbers and symbols. Once you approach a 'block', you would work out its simplest value before moving onto how it interacts with other 'blocks'.

guyfawkes5 · 29 Apr 2011 at 00:38

By the way, how many 'I'm an engineer, it's X' followed by 'GOOGUL SEZ ITS Y' followed by 'I'm a scientist, it's X' followed by 'OMG ITS Y' posts are we going to get in this thread?

MikeHunt79 · 29 Apr 2011 at 00:38

guyfawkes5 said:
By the way, how many 'I'm an engineer, it's X' followed by 'GOOGUL SEZ ITS Y' followed by 'I'm a scientist, it's X' followed by 'OMG ITS Y' posts are we going to get in this thread?

I'm a rocket surgeon, it's 1

MagicBoy · 29 Apr 2011 at 00:39

The calculator on my Mac says :

This agrees with the rules of precedence that I was taught at Uni.

Mason- · 29 Apr 2011 at 00:40

I would love to see the level of education e.g. GCSE/O-Levels, A Levels, Degree Level, Higher.... against the answer chosen.

I understand both sides of the coin, but my head always says 1, all the people who I've asked in my maths class (Further Maths A-Level) Agree with me on it being 1 on first impressions, having then showing them both sides of the coin they agree it's ambiguous. And that's all it is, ambiguous.

snowdog · 29 Apr 2011 at 00:42

Mason- said:
I would love to see the level of education e.g. GCSE/O-Levels, A Levels, Degree Level, Higher.... against the answer chosen.

I understand both sides of the coin, but my head always says 1, all the people who I've asked in my maths class (Further Maths A-Level) Agree with me on it being 1 on first impressions, having then showing them both sides of the coin they agree it's ambiguous. And that's all it is, ambiguous.

Why, it says
6/2(1+2)
not
6/(2(1+2))

6/2(1+2) Automatically means (6/2)*(1+2).

In most calculators anyhow. And I've been learned to follow that.

Just type it in your casio or texas instruments graphical calc or in google and it will always say 9.

gambitt · 29 Apr 2011 at 00:43

0.99r

guyfawkes5 · 29 Apr 2011 at 00:43

Excellent, now that normal service has resumed...

Gangster said:
C'mon seriously? Some people....

19 of you that answered 1, hope your employer isn't looking at this!

Name and shame the 19.

Gangster said:
C'mon... 24 now!! you are all pulling my leg....

Maybe retroactive punishments can begin?

Gangster · 29 Apr 2011 at 00:44

I think people are saying 1 for the lulz

This +111

snowdog said:
Why, it says
6/2(1+2)

not

6/(2(1+2))

6/2(1+2) Automatically means (6/2)*(1+2).
.

MagicBoy · 29 Apr 2011 at 00:44

snowdog said:
Why, it says
6/2(1+2)
not
6/(2(1+2))

6/2(1+2) Automatically means (6/2)*(1+2).

In most calculators anyhow. And I've been learned to follow that.

I don't think it does. * takes precedence over / therefore :

6/2(1+2) Automatically means 6/(2*(1+2))

Django x2 · 29 Apr 2011 at 00:45

Look, FFS, its 9 alright?

It's basically (6 / 2) * (1 + 2) = 9

End of

guyfawkes5 · 29 Apr 2011 at 00:45

Gangster said:
I think

I disagree.

Eric's collar · 29 Apr 2011 at 00:45

I'm a mathmagician and the answer is 9. I know all the squares up to 15.

Django x2 · 29 Apr 2011 at 00:46

MagicBoy said:
The calculator on my Mac says :

This agrees with the rules of precedence that I was taught at Uni.

Just another reason not to buy a Mac!

guyfawkes5 · 29 Apr 2011 at 00:46

Lucero said:
Look, FFS, its 9 alright?

It's basically (6 / 2) * (1 + 2) = 9

End of

Thanks for breaking that down for us, got a bit fuzzy there for a bit...

Mason- · 29 Apr 2011 at 00:46

snowdog said:
Why, it says
6/2(1+2)
not
6/(2(1+2))

6/2(1+2) Automatically means (6/2)*(1+2).

In most calculators anyhow. And I've been learned to follow that.

But does it automatically mean that? Why doesn't it automatically mean 6/(2+4)

And my calculator seems to think it's 1.

You should really accept the facts that, it can be interpreted either way and the other fact that it doesn't matter.

asim18 said:
The ratio of retards to non-retards is quite worrying.

I do hope that is a joke.

Since when did mathematical knowledge have a direct link to being retarded.

You're creating a massive false dilemma right there.

MagicBoy · 29 Apr 2011 at 00:47

Lucero said:
Just another reason not to buy a Mac!

That took at least 5 more minutes that I was expecting.

guyfawkes5 · 29 Apr 2011 at 00:47

Mason- said:
I do hope that is a joke.

Since when did mathematical knowledge have a direct link to being retarded.

You're creating a massive false dilemma right there.

I would mention autism in a spate of pedantry, but I'll refrain.

I do agree on the principle though, there's been a lot of ironic arrogance within this thread.

Poll: 6÷2(1+2)

6/2(1+2) = ?

9

1

Eric's collar

Eric's collar