6 ÷ 2(1+2)
19 posts • Page 1 of 2 • 1, 2
6 ÷ 2(1+2)
Bored and found this math question... Lets get back to school... what is the answer for...
6 ÷ 2(1+2)
?
6 ÷ 2(1+2)
?

auhckw  Posts: 1664
 Joined: May 24th, '
 Location: Malaysia
Re: 6 ÷ 2(1+2)
The answer shown in ImageShack is wrong
In this equation, priority is given to the operation 2(1+2) before 6÷2.
So, the right answer should be 1.
In this equation, priority is given to the operation 2(1+2) before 6÷2.
So, the right answer should be 1.

Fabien  Posts: 70
 Joined: May 12th, '
 Location: HauteSavoie, France
Re: 6 ÷ 2(1+2)
Fabien wrote:The answer shown in ImageShack is wrong
In this equation, priority is given to the operation 2(1+2) before 6÷2.
So, the right answer should be 1.
Sorry but recall the order of operations:
1. Parenthesis
2. Exponents
3. Multiplication/Division which ever occurs first from left to right
4. Addition/Subtraction which ever occurs first from left to right.
so you start by adding (1+2)
and it turns into 6÷2(3).
But then as all that is left is multiplication or division, we look from left to right and 6÷2 goes first turning it into 3 times 3, or 9.
I should say rarely would someone in real life write a problem like that, and problems of that nature are supposed to be intentionally misleading.

AdamMY  Posts: 2363
 Joined: Jul 22nd, '
 Location: Capital of the Mitten
Re: 6 ÷ 2(1+2)
AdamMY wrote:I should say rarely would someone in real life write a problem like that, and problems of that nature are supposed to be intentionally misleading.
Exactly.

Drax  Posts: 2559
 Joined: Oct 16th, '
 Location: Arlington, VA
Re: 6 ÷ 2(1+2)
You can also think of it fractionally as (6(1+2))/2

bearsbearsbears  Posts: 461
 Joined: Jun 15th, '
 Location: Lawrenceville, GA
Re: 6 ÷ 2(1+2)
I couldn't tell you the last time I saw the ÷ sign in an equation . My initial instinct was 1, but caught myself... tricky tricky

Running for Tea  Posts: 129
 Joined: Aug 14th, '
 Location: Ohio
Re: 6 ÷ 2(1+2)
without those "spaces" around the "÷" it's less tricky
 fdrx
 Posts: 208
 Joined: Sep 2nd, '1
Re: 6 ÷ 2(1+2)
As I recall, the order of Operations went.
Dear
Ben
Please
Excuse
My
Dear
Aunt
Sally.
Divide
Bracket
Parenthesis
Exponents
Mutiplication.
Duh....
Ahhhhhh
Sheesh... I'm stupid.
Dear
Ben
Please
Excuse
My
Dear
Aunt
Sally.
Divide
Bracket
Parenthesis
Exponents
Mutiplication.
Duh....
Ahhhhhh
Sheesh... I'm stupid.

SlientSipper  Posts: 322
 Joined: Nov 21st, '
Re: 6 ÷ 2(1+2)
Interesting, i didn't have second thoughts about answer 9

Xell  Vendor Member
 Posts: 434
 Joined: Jan 7th, '1
 Location: Japan, Nagasaki
Re: 6 ÷ 2(1+2)
I would add that the division symbol confused me initially. Writing it out as fractions clears the ambiguity up; I guess that's why you stop using it once you hit Algebra 1 in high school. fdrx is right in that the spaces around the division symbol don't help clarity at all.

Casualconnoisse...  Posts: 31
 Joined: Jul 21st, '
 Location: The Frigid North
Re: 6 ÷ 2(1+2)
I can't believe that i got it right, much less remembered how to do it, lol.

p_funk  Posts: 31
 Joined: May 20th, '
Re: 6 ÷ 2(1+2)
Let's keep the ball rolling:
The prize money of $180 from a competition is to be divided between three children.
Adam won the first prize, Beth won the second prize and Chris won the third prize.
It is decided that the division will be in the ratio of:
1st : 2nd : 3rd = 5 : 3 :1
How much does each child receive?
Answer: http://imageshack.us/photo/myimages/16/answert.jpg/
The prize money of $180 from a competition is to be divided between three children.
Adam won the first prize, Beth won the second prize and Chris won the third prize.
It is decided that the division will be in the ratio of:
1st : 2nd : 3rd = 5 : 3 :1
How much does each child receive?
Answer: http://imageshack.us/photo/myimages/16/answert.jpg/

bagua7  Posts: 1222
 Joined: Jul 21st, '
Re: 6 ÷ 2(1+2)
If you are going to discuss math, at least ask interesting questions. Such as stuff relating to what I have been working on, but accessible to lay people who want to think logically.
Assuming between two people they either know each other or they do not. What is the smallest group of people you must assemble such that you either have 3 of them which all know each other, or 3 of them that do not know each other?
Similarly, what if we replaced that with either 4 people that all know each other, or 3 people that do not know each other?
(Hint before considering the second question tackle the first).
Assuming between two people they either know each other or they do not. What is the smallest group of people you must assemble such that you either have 3 of them which all know each other, or 3 of them that do not know each other?
Similarly, what if we replaced that with either 4 people that all know each other, or 3 people that do not know each other?
(Hint before considering the second question tackle the first).

AdamMY  Posts: 2363
 Joined: Jul 22nd, '
 Location: Capital of the Mitten
Re: 6 ÷ 2(1+2)
AdamMY wrote:If you are going to discuss math, at least ask interesting questions. Such as stuff relating to what I have been working on, but accessible to lay people who want to think logically.
Assuming between two people they either know each other or they do not. What is the smallest group of people you must assemble such that you either have 3 of them which all know each other, or 3 of them that do not know each other?
I don´t understand how this is possible to answer....if you have any number of people all of them could know each other or none of them could know each other or any number of pairs of people within the group could know each other.
At first I thought the answer was 3...because it´s certainly possible to have a group of 3 that knows each other or a group of 3 that does not know each other but it´s also possible to have a group of 3 in which one person knows both others but they do not know each other or a group of 3 in which two people know each other but neither knows the 3rd person.
If I make the group size 4 then if none of them know each other there are 4 people that do not know each other not 3 people that do not know each other. Any group size greater than 3 has this problem.
A group size less than 3 can´t satisfy the conditions in any case at all since there aren´t 3 people to know or not know each other.

entropyembrace  Posts: 1914
 Joined: Mar 3rd, '0
19 posts • Page 1 of 2 • 1, 2