# 6

Discussion in 'Off Topic' started by Vihzel, Apr 28, 2011.

?

## 6÷2(1+2) = ?

94 vote(s)
54.3%

77 vote(s)
44.5%

2 vote(s)
1.2%
1. ### Vihzel Destroying Balls Everyday Thread Starter Rank: None Points: 333 Posts: 5,364 Joined: Apr 8, 2010

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Welcome to one of the easiest algebraic equations in the world!... or is it? MUAHAHAHAHA!

Can you solve this pesky little problem while also giving damning evidence that the other 2 can not possibly work?

YOU MUST CHOOSE ONE AND ONLY ONE!

Calculations:

6

#1
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2. ### Bob Maxey Android Expert Rank: None Points: 233 Posts: 4,836 Joined: Sep 24, 2010

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LOL . . . the debate continues.

Actually, I once used a similar problem in HP ICT Training. In my case, it was this one: 1 + 2 x 3 = ?

Some said 9, some said 7. Oddly, when I expressed it the following way, time to solve was longer: 1.0 + 2.00 x 3.000 = ___

The answer to your question is 8.96. Also, make the responders prove their answer.

Since I am a world champion thread hijacker, I'll ask the gathered group to give the next number in this series and explain their guess.

1,1,1,2,1 _____

Bob

PEMDAS!

Nuff Said

If you are bored, try these math problems.

Unsolved Problems -- from Wolfram MathWorld

Bob

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3. ### Usta Android Expert Rank: None Points: 333 Posts: 2,585 Joined: Jul 8, 2010

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@Vihzel,
Can I have a voting option: Both "9" and "1"?

#3
4. ### Abdur Android Enthusiast Rank: None Points: 63 Posts: 252 Joined: Sep 30, 2010

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If you use the order of operations, Brackets comes before all Therefore 9 would be the correct answer
(Either 9 or 1 )

#4
5. ### Vihzel Destroying Balls Everyday Thread Starter Rank: None Points: 333 Posts: 5,364 Joined: Apr 8, 2010

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You have to make a decision simply based on the equation given in the title. Imagine as if you had that on a test. Better be careful.

An equivalent problem was posted on a physics forum with two answers essentially at 50/50.

#5
6. ### Stinky Stinky Android Expert Rank:  #40 Points: 643 Posts: 4,354 Joined: Aug 31, 2010

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Ahhh!

I like a challenge!

I LOVE Maths even though I suck at it so much!

Hmm the brackets say that is a single unit but on the other hand the division sign shows the whole thing or the entire equation is divided by 6.

So it looks like this:

2(1 + 2)
________

6

So it is 1.

So I think the answer is 1 if we use BODMAS. It should be that I think so at least.

However BODMAS claims that Division comes before multiplication and then multiplication comes after Division in that order / sequence.

But some Mathematicians say that neither Division and Mulitplication comes before the other but I am not too sure why lol.

I think they are both equally important because both basically boil down to Add and Subtract.

World champion thread hi-jacker LOL you make me laugh dude!

If we use sequences and series I think the answer is 3

I think this is an "Dual" infinite sequence

That is there are two sequences in this number line.

First Sequence is 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

NOW the second sequence is:

1, 2, 3, 4, 5, etc etc

But I could be totally wrong lol

#6
7. ### 330D From My Cold Dead Hands Rank: None Points: 213 Posts: 2,863 Joined: Mar 4, 2010

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You must solve the problem within the brackets as per the order of operations, therefore it must be 9. Don't you guys remember 6th grade math?

#7
8. ### Usta Android Expert Rank: None Points: 333 Posts: 2,585 Joined: Jul 8, 2010

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Brackets are clear enough. The more interesting part is this:

6
--- * 3 = 9
2

or

6
--- = 1
2*3

Depends how you look at it...

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9. ### indybail Well-Known Member Rank: None Points: 58 Posts: 139 Joined: Jan 27, 2011

The parentheses dictate that the product within them should multiplied by the product external to them.

#9
10. ### lunatic59 Moderati ergo sum Moderator Rank:  #3 Points: 4,138 Posts: 33,138 Joined: Jun 12, 2010

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Ahh, wonderful trick question. I haven't seen this since my days as a janitor for the CIA ... ladies rooms only (hey, government jobs have their perks.)

It a basic binary cipher where integers represent 1's and symbols 0's so:

6

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11. ### nyydynasty Android Expert Rank: None Points: 103 Posts: 956 Joined: Sep 13, 2010

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google says so ... i'm voting "9"

#11
12. ### Roze Hiding behind a mystery Rank: None Points: 333 Posts: 9,814 Joined: Jan 20, 2010

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I go with 9 because of BODMAS

#12
13. ### shawn1224 Ex CEO-DNPSEA foundation Rank: None Points: 163 Posts: 2,186 Joined: Dec 10, 2009

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Wolfram Alpha says 9 so I'm going with that.

I'm guessing the answer is 3

The sequence is

1,1

1,2

1,3

1,4

1,5

and so on ...

#13
14. ### krouget Android Enthusiast Rank:  #355 Points: 68 Posts: 456 Joined: Jan 13, 2010

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The problem is more clearly written like this: (6/2) * (1+2), in which the answer is 9.

We were always taught to write using parenthesis/brackets when in question, so as to be clear about our intention, and to circumvent confusion.

In order for it to be 1, people would have to add their own set of parenthesis/brackets, which wouldn't follow the problem, as written. It's not written as: 6/[2*(1+2)], for example.

#14
15. ### dan330 Android Expert Rank:  #27 Points: 923 Posts: 11,858 Joined: Jan 22, 2010

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my answer is 1.
following BODMAS
and the assumption of (), when next to a #, there is an assumption fo () around them.

so the equation should read:
(6) / (2(1+2)) =
6 / (2(3)) =
6 / 6 =
1 = x

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16. ### jroc Android Expert Rank: None Points: 363 Posts: 2,614 Joined: Apr 10, 2010

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its 1

In school many years ago they taught us PEMDAS or Please Excuse My Dear Aunt Sally if that helped ppl remember it easier. They still do this today, my kids school anyway.

Parenthese
Exponents
Multiplication
Division
Subtraction

Ahhh I was in so big of a rush I see Bob Maxey aleady bought up PEMDAS. It pays to read threads from the beginning to end and not skip...lol

I see one thing...there are some different schools of thought in here...lol I'm sticking with 1.

Now I'm curious: I see BODMAS could be interpreted division first than multiplication. How can one use both PEMDAS and BODMAS and get the same answer?

And doing some reading I guess I should say they taught us PEMDAS in the U.S.

#16
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17. ### gallandof Android Expert Rank: None Points: 183 Posts: 1,927 Joined: Jul 8, 2010

theres two right answers, if I remember PEMDAS was actually

P
E
M+D
A+S

and it shouldnt matter what order you use. except with this problem CURSE YOU!

#17
18. ### gallandof Android Expert Rank: None Points: 183 Posts: 1,927 Joined: Jul 8, 2010

as for your problem bobby boy (just felt like it ) im going to guess the answer is 3 although with my answer im inputting my own order

#18
19. ### ParishL31 Android Enthusiast Rank: None Points: 68 Posts: 409 Joined: Oct 15, 2010

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I say 9 as well. With PEMDAS, it's what's inside the parenthesis. As others have said, when the one number is in the parenthesis and the other is outside, it can simply be rewritten with a multiplication symbole.

2(3) = 2 * 3, and once you rewrite it that way, PEMDAS takes over and you divide 6/2 first then multiply by 3.

Also just punched it into my TI-83 and got 9. I trust that thing with my life...well at least when it comes to math.

#19
20. ### apavolka Android Enthusiast Rank: None Points: 43 Posts: 495 Joined: May 15, 2010

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Order of operations (PEMDAS) states that multiplication and division is done left to right in the same step... as is addition and subtraction.. answer is 9.

http://www.purplemath.com/modules/orderops.htm
Second paragraph about ranks

#20
21. ### apavolka Android Enthusiast Rank: None Points: 43 Posts: 495 Joined: May 15, 2010

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Also hate to burst your bubble but unless you dictate the order of operations into the equation when it is entered into a ti-83/84, the calculator will NOT follow order of operations.

However you are still correct.

#21
22. ### MyNamesTooLong Android Expert Rank: None Points: 78 Posts: 826 Joined: Jan 17, 2011

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it's 1...order of operations.

#22
23. ### dan330 Android Expert Rank:  #27 Points: 923 Posts: 11,858 Joined: Jan 22, 2010

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so.. does the OP even have the right answer?????

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24. ### jroc Android Expert Rank: None Points: 363 Posts: 2,614 Joined: Apr 10, 2010

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^lol!!

The parentheses is the key. Thats why I think its 1. Now that I think about it, I see how using BODMAS gives the same answer of 1. You work with the parentheses until you cant anymore.

Now I see how dan330 could use BODMAS and still get 1. And 2(3) is 2 times 3, thats what I was taught. Solving that still working with the parentheses makes that 6. Then its 6

#24
25. ### Bob Maxey Android Expert Rank: None Points: 233 Posts: 4,836 Joined: Sep 24, 2010

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Clue #1:

Do not look at it as a math problem. Think every day life.

#25