It's a simple mathematical puzzle, please tell me what answer you get for this question:
6÷2(1+2)=?
Results 1 to 17 of 17
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29-04-2011 12:51 AM #1
What is the answer to the following question...?
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29-04-2011 08:47 AM #4This quote is hidden because you are ignoring this member. Show Quote
Wish the equations I dealt with on a day to day basis were as simple as that againMadness, as you know, is a lot like gravity. All it takes is a little push.
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29-04-2011 09:20 AM #6
First up - thanks for taking my mind off this awful wedding with this little brain jog.
Seems the answer is indeed 1
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29-04-2011 11:09 AM #7
- Join Date
- Apr 2009
- Posts
- 206
BODMAS.
The answer is indeed 1.
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29-04-2011 11:11 AM #8This quote is hidden because you are ignoring this member. Show Quote
I reckon the answer is 9. 3 x 3.
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29-04-2011 11:23 AM #9This quote is hidden because you are ignoring this member. Show Quote
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29-04-2011 11:27 AM #10This quote is hidden because you are ignoring this member. Show Quote
B(rackets) = 3
O(f) n/a
D(ivide) = 3
M(ultiply) = 3(3) , ie 9
A(dd) n/a
S(ubtract) n/a
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29-04-2011 05:34 PM #12
to put your mind at rest the answer is in fact one (1)!
When written out in an algebraic fashion, the 2(1+2) is treated as a single entity and thus must be dealt with first.
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29-04-2011 06:53 PM #13
I went with 6÷2. 3
(1+2) 3
Gives you. 3x3. Hence my seemingly daft answer of 9
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30-04-2011 02:36 PM #14
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
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01-05-2011 01:26 AM #15
Initally I thought it was 1 - after seeing on a facebook poll that over half thought the answer was 9 I investigated and it turns out it is 9. Something to do with multiplying before you divide
Here is what was said:
I am your college professor that you requested, with a doctorate in Mathematics. I will break this down as simply as possible and end this debate as approx. 10 students have already asked me this today.
The problem as it is written is 6÷2(1+2) , the ÷ cannot be substituted with a fraction bar because they have different ranks on the order of operations. It is an illegal math move to do this. The bar ranks with parentheses, ÷ is interchangeable with *. therefore the problem must be solved as 6÷2(1+2) NOT 6 (over) 2(1+2) we do the parentheses first, so 6÷2(3), the parentheses are now no longer relevant, because the number inside is in it's simplest form. Every single number has implied parentheses around it.
6÷2(3)
(6) ÷(2)(3)
6÷2*3,
or even converting the division to multiplication by a reciprocal (a legal math move)
(6)(1 (over) 2)(3)
are all correct ways to write this problem and mean exactly the same thing. Using pemdas, where md and as are interchangeable, we work from left to right, so (3)(3) or
3*3= 9
Just because something is implied rather than written does not give it any special rank in the order of operations.
The problem in it's simplest form, with nothing implied would look like this:
(1+1+1+1+1+1 (over) 1) ÷ (1+1 (over) 1) * ((1(over) 1) + (1+1 (over) 1))
From here, nothing is implied, This again, works out to 9.
If the symbol '/' was used this whole debate would be ambiguous since that symbol can mean "to divide by" or it could mean a fraction bar.
HOWEVER, because the ÷ symbol is used, it can not be changed to mean a fraction bar because that would change the order of operations and thus the whole problem, you can't change a symbol to mean something because you want to, in doing so you are changing the problem.
Once and for all, the answer is 9.
Hopefully some of my students see this so I can stop answering this question.
End of debate... hopefully.Mon the Hibs.
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02-05-2011 11:04 PM #17
This
Type
Of
S***
Is
Exactly
Why
I
Dingied
Maths
ASAP
A wee acronym for y'all to memorise and use, like, about as often as I use BODMAS, or SOHCAHTOA etc etc
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